Just when you are a member of a minority, communicating to others of the same minority feels weird.
Along patriotic lines - either you are a bit less real than them, or they than you, first.
Second, more importantly, among certain minorities some people trust “their own” more for business, employment, anything, and thus there are scams based purely on that.
Third, with people of a bit different background you are more eager to give some benefit or doubt or something when they show their personal downsides, with people of “your” group those downsides are much more infuriating and there’s a fallacy of presuming you understand them better.