The problem with the migrants is that they are unassinilatable people hostile to Germany and Western Culture. The migrants are increasingly an in your face, hostile and violent permanent welfare cases.
The Muslims see Western style welfare not ha s hand out to help them build a life in Germany, they see it a form of Jizya tax that is rightfully provided to them by German dhimmis as is their right under the Koran.
I've said this before.
A few years after reunification, I heard a news report on KABC-AM that Germany passed restrictions on Turkish immigration, and that the Simon Wiesenthal Center announced that Germany was reverting to its racist, Nazi past.
Shortly thereafter, Germany rescinded the restrictions, lest they be regarded as racist.
When Germany tried to restrict Muslim immigration, Jewish NGOs and "world opinion" frowned.