I agree. I've generally been part of groups that were very mixed as far as culture, sexual preference, or skin color goes, and most of our interactions went wel

I agree. I've generally been part of groups that were very mixed as far as culture, sexual preference, or skin color goes, and most of our interactions went well beyond 'micro-aggression' right into overt racism, misogyny, anti-semitism, and whatnot. I've found that the more mixed the group was, the more of this kind of stuff happened and the less sensitive people seemed to be about it. And to be clear, that's just an observation. As a white, male, highly-educated person I try to avoid judgements or too many opinions on this issue.