text: NTA, let her Enjoy her presumed identity. I have one friend who has German heritage, and she is very proud of it, brags about it a lot, serves "German" beer and bratwurst at just about all of her get-togethers, but whatever. I have another friend who is some sort of Asian nationality from a biological standpoint, but was adopted by an American couple in the military, and grew up most of his life in Germany. He is probably more "German "then she is, but he just lets it go, like we all do.