Just a very quick post to put forward my own theory, or my own vision, of what lies at the heart of the political correctness problem.
The problem is that PC is not only the establishment, but it's an ongoing revolution. The politically correct don't see PC as being the norm today-- or, if they do, they think it's long overdue and not nearly enough. They are pushing for much, much more. They think ordinary language, entertainment, advertising etc. is outrageously racist, sexist, homophobic, transphobic, etc.
For instance, the PC brigade think that media coverage of Islamic terrorism is Islamaphobic, while anti-PC people think (correctly, in my view) that it's far too cautious. (This is just an example. I think Islam is a complicated issue and I don't go along with the "bash Islam at every opportunity" agenda. Insulting the heritage and the religious identity of millions of people is, in my view, both unwise and unseemly. But that doesn't mean we have to be naive or dishonest.)
When there is such a disparity, I don't think goodwill and "dialogue" is possible. You have two mental worlds living alongside each other, and in inevitable tension. Personally I feel I am deep-sea diving whenever I venture into the mainstream media, mainstream entertainment, or even social interaction involving PC people. I couldn't breathe in that element for very long.