The problem is many of those complaining about political correctness are in fact racist or harbor some other harmful ideology - how do you know this without linking data or poll responses to back it up?
Are you a freaking mind-reader?
And what about persons of colour who complain about political correctness? (don't fool yourself, there are people of colour out there who complain about PC culture.)
Y'see, this is a big part of the problem. People like Peaceful Pete here can call others racist, and that's it - there's no apparent need to back up these claims?!
Calling racism is the modern equivalent of a witch hunt.
And this goes against Western principles of justice. Innocent until proven guilty.