I'd like to add a German perspective here.

I was born in Germany in 1987.
When I went to a middle class-y school in the late 90s and early 2000s, there already were big groups of migrants with a background in muslim countries.
When going home alone, there was a constant fear of being targeted.
A friend of mine got it bad, went home alone from school, ended up in the hostpital.
I was spat on and had to come to school through a wooded area and backdoor for a few weeks because I pushed back and called them names.
Fear of violence and sometimes violence itself was an everyday reality.
This is a shared experience of many of my adult-life friends.

Today, there are areas of big German cities where ambulances refuse to go like Duisburg-Marxloh where the state has essentially given up.
My elderly mother was subject of a gesture by a young muslim man suggesting that her head will be cut off when she was in Dortmund.
In the city next to my home village, 2 people were shot by muslim youth last year and this year. Something like that was totally unheard of.
Trash on the street and other reckless behavior has increased significantly.
Gang violence is on the rise.
The son of a friend of mine experienced a knife attack. In elementary school.
Another friend of mine became a teacher, and young muslim migrants at his school took one of their fellow students, hold him down while another one landed a kick on his knee, completely destroying it.
Public open air baths have become hunting grounds for testosterone driven primates.
And it's not just violence by itself, it's open disdain for the state and the native population by significant parts especially of young muslim men.
This is way, way, way beyond isolated incidents.

Almost all of these problems are completely nonexistent with Asian or other migrant groups.

OF COURSE not all muslim immigrants are that way.
I had multiple personal friends or coworkers from Turkey or Syria.
Good, kind folks. Often hard working.
My company even pleaded with the government to keep them from deporting one of the Syrians back to wherever. He was learning the language fast and was a good guy.
But of course they didn't care.
And that's while know migrant street thugs and gang bosses who are on the state's deportation list roam freely.
I suspect it's because the "good guy" has an official address registered with the authorities and tries to follow the rules, easy prey for lazy public servants.

It gets even worse: you can't complain about all of this loudly, especially the first part, without getting painted into a corner as a neo-nazi and racist.
And while all of this is going on, the public debate, led by state media and career politicians, tries to downplay or ignore the issue.
For example, they tried to blame the public baths thing on hot weather.
Or write feelgood articles about the local zoo.
Or debate about stuff that's completely detached from the needs and worries of the everyday people on the street, like gender-neutrality in munitions procurement for the army.
And I haven't even started talking about economical issues like energy prices.

I don't have any sympathy for the AfD or other right-wing idiots.
But career politicians will need to touch base with the common German again very quickly, or things will get out of hand.