I am working class and grew up in a very rough area. If I am going to insult you, I will insult you. It is straightforward and you know where you stand.
But there is a certain kind of middle-class person who insults people using veiled language. I see it on MN all the time.
I can't stand it. It is a way to pretend to be polite and reasonable, while often throwing insults with a pretty vicious undertone.
And these people get away with it again and again.