The thing I notice is tension. Either they're afraid of me or I'm afraid of them -- doesn't seem to be any in between because practically none of them are like me in the ways that make you think someone would be peaceful with you.

So I'm sure some "rudeness" does result from the caution. But who's upset by that?

With any random black person, it's the situation that we find ourselves in that is sketchy. And rarely have we enough time to get to trust each other. Never relax apparently cuts both ways, or at least blacks act like it does.