I think, with all the Abrahamic faiths, there has been violence and warfare committed in the names of those religions and for various reasons. As I've said before though. A lot of it, for me, is really to do with foreign policy, totalitarianism, colonialism and imperialism - especially across the Middle East and Africa. I've seen violence be rationalised in secular regimes just as I have under religious ones, but a lot of this has transpired in more modern times i.e. 19th/20th Century and beyond - which is conveniently where a lot of western expansionism occurred. The religion/secular distinction is a fairly modern phenomenon. There were never issues on the scale we see now in previous centuries based off religion in isolation. Which is why I say people and their thirst for power is more of an issue than the religions themselves.