"haven". When the early Muslims overran Jewish villages they killed all the men, sold the children, and kept the women as sex slaves. When Muslims first overran Christian lands, the conquered were forced to convert or die. Then the Muslims realized that they could just take their money generation after generation if they left them alive. The Muslims took sons from Christian families for the Janissaries, which they used to conquer more Christian land. At one point the Muslims of North Africa had a million slaves that they had kidnapped from the Christian lands north of the Mediterranean. Muslims killed over a million Armenians in the early 1900's.
Then, as you mentioned, recent secular Muslim nations kept the violence somewhat in check until the West started destabilizing them, whereupon the burning and killing resumed.
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