The United States as a Christian nation

Blessed is the nation whose God is the LORD; and the people whom he hath chosen for his own inheritance. American wingnuts and figures on the Religious Right commonly assert that the United States was founded as a Christian nation. This theory does not simply reference that the majority of Americans were (and many still are) Christians (albeit of a rather large variety of denominations), but claims as a corollary that the state and its institutions should openly embrace and promote Christianity and (in some cases) the Old Testament legal code (which is a terrible foundation for laws). This is, of course, a textbook example of negationism.

History
Christian nationalists were active at the time of the founding of the United States, but in contrast to contemporary Christian nationalists, those of the mid-1800s and earlier believed that the US Constitution was an abomination because it lacked any mention of Jesus Christ rather than a Christianity-affirming document as modern Christian nationalists would try to have people believe. In 1789, the same year that the Constitution came into effect, George Washington received a message from Christian clergy that complained:

In 1793, pastor John M. Mason preached that the US would be punished by God for not having a Christian constitution. When Thomas Jefferson, co-author of the Declaration of Independence, became president in 1801, he was accused of atheism and of being an infidel by Christian nationalist and Presbyterian William Lynn:

In 1811, Congregationalist Samuel Austin complained that the Constitution "is entirely disconnected from Christianity.” In 1845, Presbyterian Reverend David X. Junkin claimed:

It was not until the 1840s when a few Christian nationalists began to claim that the Constitution was designed to perpetuate Christianity and that Washington and Jefferson were actually Christians rather than the deists whom they actually were. This remained an unpopular view among Christian nationalists for long afterward however. In 1864, ministers from 11 Christian denominations created the The purpose of the Association was:

Updated versions of the Christian nation amendment were proposed in Congress in 1961, 1963, and 1965, but never went very far. So after more than 170 years, Christian nationalists changed their tune from the US should be a Christian nation to the US already is a Christian nation despite failure to get their Constitutional amendment passed.

The Puritans
The English Puritans, known for coming over to New England in tiny numbers (and for being, well, puritanical), are cited as precedent in this case, as noted below. The argument is that the legal and social systems of these New England Puritans, which were indeed very theocratic and repressive, are the quintessential example of American tradition.

By this logic, of course, the U.S. should give up its sovereignty and restore British Imperial rule, since the Puritan states were based on royal charters. Of course, the modern UK is far more liberal than many right-wing nuts would like, but that's not the point.

This also overlooks that the first successful British settlement was Jamestown (from 1607) and the purpose of that colony was much closer to the true American tradition: get rich quick.

Not only the Puritans, but the reaction against them, are important to understanding the American Revolution; the reality is quite a bit more complicated than the "United States as a Christian nation" narrative suggests. The Puritans who did not go to America in exile mounted an ultimately successful insurgency that resulted in a Puritan victory in the English Civil War, the execution of King Charles I, and the establishment of a republican Commonwealth under Oliver Cromwell. The excesses of this dictatorship led to a monarchist reaction, but the result of this reaction was the firm establishment under English law of the principle of Parliamentary supremacy over the monarch, as codified in the Bill of Rights 1689 following the replacement of James II with William and Mary.

The "Whig" ideology that emerged from these events was quite influential in the debates that led to the American Revolution. They included the notion that the government was subject to its own laws and the rejection of the divine rights of princes. They also included a deep suspicion of the kinds of religious and sectarian radicalism that they viewed as responsible for the war, the excesses of the Puritan regime, and the resulting social unrest. John Locke's Two Treatises of Government was one manifestation of this Whig ideology that influenced the American Revolution.

The Founding Fathers
For happily the Government of the United States, which gives to bigotry no sanction, to persecution no assistance requires only that they who live under its protection should demean themselves as good citizens, in giving it on all occasions their effectual support. Rather than address explicit constitutional provisions (which, through omission, contradict their position), American fundamentalists often like to quote-mine the Founding Fathers in order to divine their intentions and "prove" that they actually envisioned the new state as a Christian nation. They primarily target George Washington, John Adams and Thomas Jefferson, the first three Presidents of the United States, and claim that they were deeply devout Christians whose actions were to a large degree inspired by their faith.

This notion is patently false: Jefferson's deistic convictions are evident from his writings, and he was a high-profile critic of established Christian dogma; he even wrote his own version of the New Testament, the Jefferson Bible, expunging the Gospels of all references to the supernatural. Washington never attended communion services at his church and took great pains to refer to his god by deistic terms like "Great Author" and "Almighty Being" in his inaugural address. While Adams credited religion in general with bolstering public morality, he was personally a deist, if churchgoing, Congregationalist and later a Unitarian (yes, the kind that eventually became Unitarian Universalism), and consistently argued that the United States had been founded on rationalist and Enlightenment principles and rejected the notion of divine legitimation for political leadership.

These eminent figures were heavily criticized for their lack of religious devotion in times past. Rev. Bird Wilson had this to say about them in an 1831 sermon:

As an aside, the thirteen colonies were not entirely Christian (there were about 3000 Jews at the time of the revolution), and it has been documented that 160 Jews and two Muslims fought on the side for independence. Haym Solomon, a Jew, was a personal friend of George Washington and was a key financier of the Continental Army.

First Amendment
A common argument is that the Establishment Clause in the First Amendment of the U.S. Constitution was intended to mean different denominations instead of different religions because the idea of non-Christians living in the United States would have been unthinkable at the time (George Washington's 1790 letter to the Jewish Congregation of Newport notwithstanding).

This is of course not paying attention to the fact that several of the founding fathers were deists, and the Christian ones were almost all secularists. There was generally a liberal feeling throughout the Christian establishment in the U.S. at that time. The New England Puritans had really lost their steam by that point (indeed, a great number of Congregational churches would become Unitarian over the course of the next half-century, including, as mentioned, John Adams' congregation); the Anglicans were, well, Anglicans; the Quakers were quite a liberal bunch as usual; other groups had the insufficient political clout to do anything but support a completely secular state under which they would not be persecuted — and of these, the Baptists (oh, the irony!) were the most vocally in favor of absolute secularism.

There is positive documentation that mere non-sectarianism was not what was meant by "free exercise of religion." In his Detached Memoranda, James Madison recounted the following occur during the passage in 1786 of Thomas Jefferson's Virginia Statute for Religious Freedom, which was specifically intended to guarantee at the Virginia state level what the U.S. Constitution did at the federal level:

In the same document, Madison opined that it was an encroachment on separation of church and state to "exempt Houses of Worship from taxes," and in response to a proposed measure to provide state support to all Christian ministers, he warned against the very concept that was being put into his mouth:

To showcase a prime example of how deeply the "Christian nation" mythographers stick their heads in the sand, Christine Millard, the owner of a Washington, D.C. touring outfit called "Christian Heritage Tours," actually quoted the above statement of Madison's and then, in a jaw-dropping non sequitur, concluded that Madison was talking only about freedom for Christian denominations.

Treaty of Tripoli
The most obvious falsification of this myth is the Treaty of Tripoli, a peace treaty signed with the Ottoman possession of Tripoli in 1797. Tripoli being a Muslim state, and accustomed to the hostility shown to Muslims by the established Christian states of Europe, the U.S. wanted to demonstrate that its religious policy was not of a similar sort, and so inserted the following language in the treaty:

The text of the treaty was printed on the front page of many newspapers without any sort of public outcry.

In the face of such a smoking-gun falsification, the best that the "Christian nation" mythographers have been able to do is assert that this was mere politics designed to keep the Ottomans happy and to harp on the point that the treaty no longer holds the force of law, having been superseded by later treaties; the latter a neat example of moving the goalposts.

Dominionist perspective
Gary North, the son-in-law of the Dominionist kook R.J. Rushdoony and a noted dominionist kook in his own right, has written against this idea as well, complaining that the U.S. Constitution, democracy, etc. was the result of an apostasy from the Calvinist Puritanism espoused by such figures as the pilgrims of the Plymouth Colony (which was responsible for such holy happenings as the Salem witch trials). In his own words:

Neo-Confederate perspective
Neo-Confederates have their own spin on this idea, which dates back to the time of the actual American Civil War. Some claim (as part of the Lost Cause of the South mythos) that the Civil War was a theological war between the heretical North and True Christian™ South, which is utter bullshit. They then use this to argue in favor of secession to establish the South as a separate dominionist Christian nation.

Christian nationalism and correlated beliefs
Frequent religious practice is not correlated with Christian nationalism. Christian nationalism was correlated with: • 2

Coup attempt
White Christian nationalists were heavily involved in both the January 6 rallies and the storming of the Capitol. The main Trump rally was opened by Paula White, evangelist and White House 'adviser', who quoted a favored Bible passage among Christian nationalist,, “Blessed is the nation whose God is Lord.” Senator Mo Brooks and Representative Madison Cawthorn spoke at the main rally and repeated Christian nationalist talking points. Christian symbolism was widespread at the siege of the Capitol. Insurrectionist Jacob Chansley gave a prayer in the Senate chamber that referenced Christian nationalist ideology, that the country would be "reborn" "In Christ’s holy name". Other Christian nationalist ideology by insurrectionists was widespread and observed both during and after the riot.