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.
Islam is not a religion. It is thought control on an extent that has Mao and Lenin slapping their palms to forehead (in the depths of Hell) and wondering why THEY didn't think of it.