When you realize religion as practiced by these primitive barbarians is merely another albeit extreme form of politics, another way in which to control, manipulate the masses to exponential effect by going beyond the here and now, to grant, guarantee eternal bliss in the hereafter, you will understand why, how ruthless men hide behind the veil of religion.
The Muslim blood soaked history is not a lot different than the history of the atheists working within their Marxist religion. We don’t admit that bloody history in the West, either.