Political correctness is, in actuality a form of censorship based on the idea that certain modes of expression are inherently offensive to members of protected classes of people, and must therefore be shunned and if possible, banned. It matters not whether individual members of those classes of people are actually offended, only that the Keepers of the Culture believe that they ought to be offended, as the same self-appointed authorities always are, about so very many things.
This is the death of Comedy, or at least the critical wounding of Comedy, which so often depends on mocking the human condition, laughing at another's expense, or at our own.