Did German immigrants face segregation racism or prejudice?

I believe they did and still do, and if you want a simple example, then go search and read about all the ugly murders of black people in Germany by locals , and that didnt happen long time ago. And ofcourse we all know how their history is loaded with hatred against the Jews, specially in Nazi Germany, but to be fair most europeans hated the Jews too and discriminated them.

I hope my brieft answer helps you.