The term “Politically Correct” originated (or received currency) in the 1970s on the Left, first as a term (usually used in the negative) to point out events or attitudes that “should” not be tolerated in a civil society. Thus, the word nigger was clearly not Politically Correct. However, it was also used to castigate other matters that were not particularly so clear cut. It was also not a term that received widespread usage.
By the early 1980s, it had been adopted by the Right as a term of disparagement for any “overly sensitive” application of rules to civil language. Thus, the use of the adjective “challenged” and similar constructions were mocked by substituting “height challenged” for “short.” Interestingly, the sort of language changes being mocked in that case rarely had any connection to Political Correctness. Rather, they were part of the ongoing effort to replace insulting terms with neutral terms that had been going on for decades, with the technical terms moron and imbecile replacing dummy and fool, only to be replaced by retarded (that quickly devolved into REEtard) and so on.
Now we have truly ignorant people making silly claims that terms such as “previously owned” replacing “used” is some sort of Lefty “Political Correctness,” never mind that no Lefty would care about the term “used” (or that it was coined to sell luxury cars to what one would suppose was a more Righty consumer group).
There have actually been cases of truly stupid “Political Correctness,” of course. The most egregious, in my mind, being the 1993 abuse of Eden Jacobowitz at Penn State for calling a bunch of drunks (who happened to be majority black) “water buffalo” despite the fact that no one on Penn’s campus could provide a single citation that “water buffalo” was a racial slur–since it clearly was not.
Less egregious examples of actual Political Correctness would include the use of “Native American” for “Indian” when the overwhelming majority of people whose ancestors lived in North America prior to 1492 would prefer to be identified by the name of their actual nation, (Lakota, Ojibway, Mohawk), and, if a broader term is required, they are quite comfortable with Indian.
However, most accusations of “Political Correctness” that have been hurled over the last 25 - 30 years would have been better labeled “stupid euphemisms” as they rarely had any connection to political causes and they have been instituted fairly evenly by right-leaning and left-leaning people demonstrating ignorance. However,it is a catch-phrase that seems to be employed mostly by the ignorant on the Right, (the ignorant on the Left having different silly catch-phrases).
Of course, by decrying “Political Correctness” instead of “abuse of the language,” you set yourself squarely in the camp of those who only wish to suppress the euphemisms on the Left while accepting the euphemisms on the Right (or who has swallowed 20 years of Limbaugh propaganda that such abuse only originates on the Left, so even Right-leaning language abuse is attributed to “liberal” sources). The imaginary War on Christmas (from which Bill O’Reilly finally backed away) was never a Lefty thing. The use of “holiday” for “Christmas” arose not on Left-wing college campuses, but in places like the Right-wing Fundamentalist Christian offices of Wal*Mart and other bastions of corporate conservatism in a misguided effort to be more open to a wider constituency of customers.
I have no idea what oppression you believe you have suffered for your use of language. I refer to people using the terms that I understand they wish to be known and I do not encounter censure for having done so. I would be curious to know just what sort of words you need to use for which you believe you are being abused.