"Didn't Germany prohibit Scientology?"
I don't know if they are verbotten, but I know the German guvmint has
tried to place strictures on Scientology.
I'm no fan of Scientology (read too many exposes while living in
Southern California).
But it makes sense to go after Scientology and let Islam alone.
I don't know of any cases of Scientologists sawing off heads from
screaming infidels.