Ran across this quote from The Character of Nations* (1997) by Angelo Codevilla. It precisely describes how PC works.
“The regime rules more by fashion — strict, pervasive, unforgiving of nuance — than by statute. It defines itself by icons and taboos.”
Departures from Received Wisdom and What Decent (White) People Think (now almost entirely run by Gramscian PC) are reacted to in exactly the same way as a grievous fashion faux pas. Like walking into a Marin county cocktail party in a leisure suit, with a mullet. The judgment and rejection instantaneous and complete. The grounds for it just as herdishly empty.
*Doesn't hurt that Sowell liked the book.