This phenomenon is nothing new.

Look at the right wing movements in history. Fascism, Nazism or any other right wing movements. These largely arise because there is too much politically correct talk going on, and at some point a guy comes along and musters the courage to say all the things openly what others had been wanting to say for years. What he says could be totally wrong and may be even absurd. But the fact that people just need a vent to release years worth of accumulated pressure will buy a lot of public validity.

Once this happens the public support, mood and direction swings too much to the other end. At this point PC won't even matter.