Unfortunately, if the Europeans wised up and expelled their Muslims, where would their destination of first choice be -- the good old USA, of course.
The problem is, that as long as the Muslims produce so much of the world's oil, they hold great power over the world. Most of Europe is even more dependent on Arab oil than we are. Only Britain, Norway and Russia possess sizeable oil reserves of their own. Any country that in some way gives its Muslims a difficult time can be threatened with an oil cutoff.