It's permissible to complain about PC, because that's too vague to implicate anybody for anything. Next time you hear that, ask them what specific politically correct opinion it is they'd like to express, and watch their face carefully, and you'll understand more.

More directly, you're insinuating that those who lament PC culture are racists. Are you sure that's the position you want to take? It seems incredibly naive and unnecessarily divisive to propose such a thing.

How did you find this out? When people complained about PC, did you ask them 'Are you really upset that you can't call people niggers and faggots any more?'

Yes, in fact. Whenever I've had these conversations with people, I always try to probe deeper to figure out why they are so angry about what should be common decency. And the answers are always the same. They think it's not about decency, and that their rights, and their way of life, are being attacked. In their minds that attack always comes from "liberals" or "niggers" or "faggots trying to rape our children in the bathroom" or some other hateful, bigoted nonsense. They think that their right to call these people out ("call a spade a spade" is an oft used phrase) is being eroded, and that means "PC culture" is preventing "dialog" and "telling it like it is" or "turning us into liberal pussies."

I cannot tell you how many times I've had this same unfortunate discussion. And every time it makes me sick to my stomach.