You miss the point. This isn't a Bible vs Koran discussion. You will have to find another thread for that.
You may not like the Koran and that Islam is an accepted religion, but it is. The majority of people practicing it, do so peaceably. That's all.
When you say that Christians have been violent, too, you beg the question of roots. Have Christians been violent because it is partof the human condition or is it basic to their religion? When comparing Christians' violence to Moslem then you cannot omit both religions' basic manuals.Its like saying your client is innocent because all the evidence tying him to the murder is some other subject.