Please explain the different sort of rude from another kind of rude, if you can. Sincerely.
In my opinion, it is rude to insult other people. It is rude if you do it in a cool, “objective” tone. It is rude if you do it with vulgarity and name-calling. It is rude if you do it in such a way that a person reading a transcript “could” understand it as not being insulting, if he tried.
This is an attempt to describe different ways of being rude. An analogy is that shooting, stabbing, and poisoning are different ways of killing.
I hope this gives an idea of what I meant.