How people set boundaries reflects where they are at in their own growth. I’ve had several people set boundaries by ending friendships over situations that added up to “I didn’t like how you talked to me that one time” or “you should have known to do x without me telling you.” Is that reasonable? Probably not. It’s pretty stupid. But they don’t know how to set a boundary, believe it will be heard and respected, and give the other person a chance to respect it. I suspect they also saw me as disposable due to their being white and me being not. Ultimately I’m better off without them in my life, because the way they set boundaries was cruel and irrational.