As I have always said - its Islam with its concepts such as kafir, jihad, kill the idoltors (those who worship idols) etc. etc. etc. that teaches muslims to be violent.
Quran needs to be revamped, Islam needs to be reformed.
But the so-called MODERATE MUSLIMS WILL NOT ALLOW IT.
You have to start first by NUKING MECCA and MADINA.
Then see how these egoistic, iherently fundamentalist muslims strighten up.
Bottomline is, till Islam reforms this will continue.