> Murder/Manslaughter Germans: 1,587 Non-Germans: 1,085 (420 refugees)
> Assault Germans: 84,776 Non-Germans: 52,412 (18,094 refugees)
> Robbery Germans: 15,435 Non-Germans: 10,378 (3,739 refugees)
> Rape Germans: 5,370 Non-Germans: 3,110 (1,155 refugees)
Source: https://www.bka.de/SharedDocs/Downloads/DE/Publikationen/Pol...
Now go ahead and put these numbers into context regarding each group's percentage in the population. And be sure to remember, that there are millions of people with migration background who count as germans because they have a german passport.
Personally I have no problem with migration of skilled people or temporary asylum for war refugees: black, brown, white, muslim, hindu, christian, whatever, I don't care. But one has to keep the bad ones out in the long term. Germany and many other western european countries failed to do that for whatever reason. And now their prisons are full of people with migration background.