So it has taken me years and years to realize that people often don't like to be seen in terms of their ethnicity. When that happens they're immediately "othered" and pointedly different. If they're just trying to fit in and get along like everyone else, pointing out their difference can cause self-consciousness or be insulting. I'm on the spectrum and I made so many people uncomfortable just by trying to be familiar with them on what I saw as their own terms. It's best to just ignore any differences and treat them like everyone else. Let them fit in without being "different".