Well why don't you take a good long look at Germany and how their society is right now segregating men and women so the refuges won't rape and attack them. If you let in hostile culture that hasn't gone through a reform similar to what Christianity went through in the middle ages you will have violent problems.
Personally, I see people who throw other people off buildings and lop their heada of as a problem, but others have different views apparently.
Stop exposing our plans...
Not in the US.