"Need I remind you that Stone Mountain and Birth of a Nation are also exercises in political correctness for their time, as are the inscriptions on the monuments erected by several southern states in honor of the service of their state’s Confederate forces at Gettysburg? ... Ranting about “political correctness” is best read as “I can’t really deal with the merits of your interpretation, so I’ll deride it largely because it doesn’t reinforce my own preferences and prejudices.”"
January 1, 1970
https://en.wikiquote.org/wiki/Political_correctness