I can only point out that "try the soul of man" is a quotatin from Tom Paine. I have a problem with garbled quotes; I once had an editor who revised "..most unkindest cut of all.." because it failed to conform to "correct" grammar and usage.

PC, as I recall, first appeared as a denigratory term back in the 1950's, when it was used by one or another radical group to describe the revisionist prose or poetr of another radical group.

I have no quarrel with those that modify lyrics to make them acceptable to a particular audience; I have a severe quarrel with those (who obviously don't include Steve Sufett) who would try to claim that the revised ones were traditional.

And the Freedom Fighters were in 1956.

So there.