Did read the link I posted about people getting in trouble for the word "Niggardly?" The fact is, plainly that there are SOME people who use the guise of political correctness as a power game. Sorry if you don't want to believe that, but the evidence is pretty clear.
Now this doesn't invalidate all of political correctness, because the world isn't black and white. The fact is, there are bad people out there, and they are on both sides (and this is true for almost any issue), and if you cannot admit this then your tribalism is actually part of the problem.