The article completely misses the orgin of political correctness. It is a term from the communist organizations in the U.S.
It started out as a rejoinder to a claim of fact.
One comrade would say: “That is factually incorrect.”
Yes, he would be rejoined, “but it is politically correct.”
The obvious point is that political correctness has nothing to do with objective fact, and everything to do with advancing a leftist agenda.
I really hate the hypocrisy of some of these old 60's protesters.