The Age of Muslim Wars has been going on for fourteen hundred years.
Well, yes and no. It's been intermittent. Sometimes, back when there was a Caliph, the Caliph would get pragmatic and care more about competence and efficiency than Islam, and things would be peaceful (it's from those periods that the myth of Islamic tolerance is spun). Usually this happened after the Muslims got wallopped in one of their endeavors of conquest and someone less hot-headed took over from the would-be conqueror. Then things were peaceful for a while because there was no Caliph and the Muslims were parcelled out into "our bastards" and "their bastards" during the Cold War.