The longstanding crisis of Syrian refugees fleeing the excruciating violence that has consumed their country collided in the streets of Paris with the security crisis posed by Islamist terrorists. No, that’s not quite right. None of the terrorists was a refugee. Nearly all, if not all, were French or Belgian nationals and some second-generation immigrants from the Mideast. It was not in the world of facts, but in the world of fears, that the two crises collided.