PC culture is anti-liberal

http://nymag.com/daily/intelligencer/2015/01/not-a-very-pc-thing-to-say.html

This article goes into how political correctness actually goes against liberal values, and is used by fringe elements on the far left to stifle and/or control debates. It shuts down debates by resorting to ad hominem attacks. It also discusses how the outrage generated by these groups is used by many websites as "clickbait" and a way to generate page views and revenue. Excellent read.