Christianity isn't violent at all.

You have to rewrite history to make it out to be anything but the peace-loving, self-sacrificing religion that it is.

For example, people lie about the Crusades all the time and try to pretend that imperialistic Muslim rulers had absolutely nothing to do with it. The thing Christian haters are pissed off about the most is that history is immutable. No matter how badly you want it to be different to prop up your stupidity, no one can change events of the past, not even God.