I would say, in the US it is at the same time "not a thing" and "an even bigger thing". I guess it is easier to be seen as American, but on the other hand, those Americans claim they are Irish/German/Italian (and the corresponding percentages), because of some great-grandfather. Germany historically also has had immigrants (e.g. Ruhr area with it's mines) but those people don't think they are Polish/Romanian, because of their ancestors.

Yeah birthright citizenship for one. Complaining that people who don't belong to a group don't identify with it and act like it is just stupid.

Doing so while not allowing them is cruel and stupid like punching someone for having a black eye and justifying it with their face looking weird.

There is the option to obtain the citizenship following the procedure for it.

There is the option to leave the country.

It doesn't sound entirely unreasonable or unfair to me.

There is also the option of being a citizen by birth, yet be called 2nd generation immigrant, or heck, third.

Yes, there is racism and ethnic stigmatization in Germany. It even goes both ways. It's a sad mess.