Militant Christianity

Militant Christianity is one of those ideas that requires a great deal of cognitive dissonance, considering how much Jesus went on about forgiveness and turning the other cheek. The more vociferous the followers of the religion are, the more likely they are to turn to violence to prove how peaceful their religion is, so militant Christianity takes many forms. To sum it up, this type of theology is a catalyst for terrorism.

Christian message on guns etc.
One of the more odd forms of militant Christianity is Trijicon, a small company in Michigan that inscribes gunsights with scriptural quotations. Militant Christianity has a long history probably going all the way back to the Emperor Constantine, whose supposed Road to Damascus type conversion to Christianity took the form of a vision in which he saw a vision of the cross inscribed with the words to "Conquer by This", inspiring him to paint crosses on his men's shields the better to slaughter the enemy.

Ron Luce
Below are examples of the violent language Ron Luce likes:
 * 1) "No souls can be saved without the shedding of blood. Blood must be shed!"
 * 2) "This is war. And Jesus invites us to get into the action, telling us that the violent—the 'forceful' ones—will lay hold of the kingdom."
 * 3) "I will keep my eyes on the battle, submitting to Your code even when I don’t understand."

Austin Cline wrote that it is only a matter of time before some crazy character takes the call to violence and bloodshed literally and acts on it.

Positive Uses
Militant Christian is also used to describe dedicated people who fight for Christianity in a nonviolent manner. Examples include Dietrich Bonhoeffer, who opposed the Nazis in Germany, and G.K. Chesterton, an influential Christian writer.

Further examples
Further examples include, famously, the Crusades and the Chinese "Heavenly Kingdom" of Hong Xiuquan. More recently, see Hutaree, the violent Christian Identity splinter movement called the "Phineas Priesthood", and Pat Robertson's apparent Ayatollah Khomeini-like fatwa against Hugo Chavez and Islam.