“They are simply not integrated into the greater society.”
I used to do safety orientations for subcontractors. One day I had two people, a young white guy and a young black guy. When I called people up to get their badges I used whatever name they put on their paperwork. The white guys name was James. When he was walking back to his chair the black guy said, “why he call you James?”. The white guy said, “what?”. The black guy said, “he called you James, I thought your name was Jimmy”. The black guy had no idea that the nickname for James is Jimmy. How could he possibly not know that? Because he is from an entirely different culture.
Plenty of black people know that Jimmy is a nickname for James.