“At some point the leftists and muslims will not appreciate each other.”
That point will come to bear once two things happen. The first is the repeal of the second amendment. The second is at the destruction of Israel. Once those two things occur the war between global Marxism and Jihad can commence.
It would neither come as a surprise or disappointment if some of the powers to be, either by design or by accident turn a particular location in the Middle East into a glazed over parking lot. In the long run it would save a lot of problems amongst it preventing the evolutionary process from going in to reverse.