Migration of unvetted people that disappear will always cause problems.
Combined with a belief structure (Islam) that is on average more violent combined with their heritage in more corrupt and lawless countries and further heightened by their gender being around 90% male:
A crime wave should have been obvious.
Migration should be kept low and under very strict controls.
As far more people want to move to Western countries then the west is willing to accept, id support refusing any higher risk individuals merely based on profiles AND kick anyone out closely associated with a criminal.
Eg if someone on a permanent visa sposors a rapist or terrorist, lets kick them both out.
