I want to add a prophetic slant to this instead of one saying they're right and the other wrong. What I see with the focus on Islam and many of those middle eastern nations in discord right now is the formation of the nations of the King of the South prophesied in Daniel.
Although not as clear yet, another northern confederacy, a revived Roman Empire will arise headed by the beast. The name sounds so derogatory as this person will come on the scene as a Messiah of sorts. This "King of the North" being Assyrian (possibly German or similar) will war with the King of the South. There's other wars at the time of the end, but I'm sure this person will also speak against "The Evil of Islam" and many people fed up with what's going on will agree and side with him.
The problem is, the beast is just as bad, no actually worse, since he will be deceiving people into thinking he's the answer. The beast will have with him the false prophet, the false church.
Now as for your comment that "Christianity" was the most violent, I cannot disagree with that, but notice I put "Christianity" in quotes showing what I think of it. It is not Christ's true church, and the truth is very few are in it right now. Just look at the traditions of men, not supported by scripture, in the church both now and historically, all in the name of Christ.
Both sides (south and north) can be very violent and pig-headed and neither have the truth, but this is not to say one day they won't have it, and they will not necessarily perish--- but rough times are coming before the time of peace.