>>7Also, due to faulty immigration politics, immigrants are not integrated into host countries, but instead are forced to live in closed communities, many don't even speak host language and have no incentive to learn it. Basically EU is getting non-integrated idle radicalized Muslim enclaves inside their countries. Muslims in these enclaves develop horrible mentality, some far worse than in their native countries. They give birth to strong ethnic mafias and lesser street gangs.
A good immigration politics prevents immigrants from forming such dangerous structures, but no EU.