Well, I stand by my theory.
The Crusades. Around 1300 years after the beginning of Christianism.
Now. Around 1300 years after the beginning of Islam.
This is the Muslim Crusades.
This argument is always interesting to me, because it always sounds like an attempt to dismiss the violence as a necessary part of the cycle, just because 800 years ago Christianity was pretty violent. Is your implication that every religion has to go through a Crusade-like period?
I won't go so far as to say that Islam is necessarily violent. But the reality is, it doesn't matter what Christianity (or any other religion) did 800 years ago. If Christians were still calling for holy wars now, it would be just as fair to criticize them for preaching violence. But this is the 21st century, and they aren't.