I have always believed this — The peacefulness of a Muslim is inversely proportional to how devout and seriously he takes the Koran and the Hadiths.
The more seriously one studies and obeys the Koran and Hadiths, the more violent one becomes.
The less seriously and the more ignorant a Muslim is about the Koran and the Hadiths, the more peaceful he is likely to be.
It is not the disciples of islime who are at fault; it is the pseudo-religion itself. THAT is why it must be exterminated.
But since you can't exterminate an idea, the best we can do is wipe out its adherents.