Political correctness is a political/brainwash technique cooked up by the Frankfurt school of communists (aka luciferians). The Frankfurt school built on the devious work of Gramsci and Lukacs. It was devised to shut up any people seeking to protect the main institutions (given by God) that help humanity – the family, Christianity and the nation.
If you study the political correctness rules (tyrannical rules) they forbid you to criticize or name the factors used to destroy the family, Christianity and the United States (or any other nation or national identity). Through political correctness you are forbidden to speak the truth, name the enemy and defend the underpinnings of western civilization.
See, for example, http://www.mediaaccess.hu/userspace/pdf_files/PoliticalCorrectOrigin.pdf