The upsurge of political correctness is not just greasy-kid stuff, and it’s not just a bunch of weird, unfortunate events that somehow keep happening over and over. It’s the expression of a political culture with consistent norms, and philosophical premises that happen to be incompatible with liberalism. The reason every Marxist government in the history of the world turned massively repressive is not because they all had the misfortune of being hijacked by murderous thugs. It’s that the ideology itself prioritizes class justice over individual rights and makes no allowance for legitimate disagreement. (For those inclined to defend p.c. on the grounds that racism and sexism are important, bear in mind that the forms of repression Marxist government set out to eradicate were hardly imaginary.)
http://nymag.com/daily/intelligencer/2015/11/can-we-take-political-correctness-seriously-now.html