By the time this thread gets up to 200 comments, there will probably be several people saying "but Christianity/Judaism did X for thousands of years too!" to try to downplay the fact that Islamic societies are really not that much different in many ways from where they started. Go back 2,000 years and you'll find that the level of behavior we all find barbaric (crucifiction, torture, rape-as-war-tactic and many others) were very common all across the world. What you'll find, though, is that the societies that systematically started moving away from them the hardest are the ones that embraced monotheism of the Judao-Christian line.
The problem isn't the Arabs, Persians, Egyptians, etc. The communities that embrace the other Abrahamic religions in those countries are peaceful. A Christian Arab is no more likely to violently attack The Other on the street than a typical mainline American Christian. Similarly, white American converts to Islam are often as violent and extreme as conservative Arab and Persian Muslims.
If Saudi Arabia were overwhelmingly Coptic, not Islamic, we wouldn't be having this conversation.