What can peaceful European countries like Sweden and France do to protect themselves from muslim immigrants?

I'm sure everyone's heard about the Muslim problem in Europe by now. Immigrants, predominantly from Africa and the middle east come to Europe for a better life, but end up bringing their primitive religious lifestyle with them. They leech off of welfare, viciously attack and white Europeans for "discriminating" against them by not dating them, and have large families to try and displace the European natives. Anyway, short of deporting these people (which would be a mive endeavor), what can be done to make them leave?