Islam is the world religion of Satan, there is absolutely no doubt in my mind.
Satan's greatest trick is not convincing man there is no God, but convincing man He is God, and that is exactly what Islam is.
There are many good Muslims - even some on our side. But they are good human beings to the degree that they are bad Muslims, i.e. lax about their religion and more secular. And I cannot for the life of me think of one good thing that Islam, per se, has contributed to the world.