I'm pretty sure if you ask anyone they would say there was nothing polite about that exchange.
By what definition was that exchange polite? None that are based in reality or relevant.
I'm not interested in arguing about the definitions of words.
I think you are saying that mainstream culture has adopted rude behavior, while I am saying that any behavior adopted by mainstream culture is, by definition, not rude.
I'm not interested in arguing about the definitions of words.