If Islam is a religion, so is Nazism.
Islam is not a religion (which is our first mistake -- referring to it as one). It is, simply, a systematic control over every aspect of a follower's life, from how he handles his finances to how and whom (and how many times) he marries.
It is a system that would have made the KGB green with envy.
Mohammed's masterstroke was in convincing people that his own persoanl preferences and ideology were somehow divinely inspired. Otherwise, Mo is merely the Middle East version of Norm from "Cheers" ('Wouldn't it be great if...'), only with ambition.
The issue is Nazism was
a. Rather contained.
b. Political (with some 'religious' overtures)
c. Very young.
Islam is a religion. We can kvetch about it all day long, but it is a religion just like lots of other wacky ones out there.
It's either all or nothing.
And yes, since I don't have a 'formal' religion, I'm one of those chewing my nails when some folks start yelling banning or forced conversion.
And so is cannibalism.