A reader comments:

I think we should pay homage to perhaps the first Post-PC comedian, who in fact pre-dates the Post-PC period.  He actually pre-dates the PC period.  That great man is Mel Brooks.  In movies such as Blazing Saddles and The Producers (the original), he would make racial, religious, gay, etc. jokes, knowing very well some would be offended, but also knowing that he was willing to suffer their slings and arrows if the rest of the audience would get the joke.  Perhaps, that is why The Producers is successful again in this Post-PC world.  Can you picture any other comedian writing "Springtime For Hitler" in the 60s?

Yep, he blazed a trail.