Bill Maher is mixed from some good points to some crappy points IMO.
This is him defending his 'theme' and his comedic expression - there's a reason his claim to fame was a show named 'politically incorrect'.
That was a slap in the face of the 'politically correct' phrase. Some of that is good, some bad. Of course he's a sort of absolutist on the issue.
And I disagree with him where he goes too far. For example, watching the mother of Tayvon Martin interviewed recently, the group of reporters asked her what her son was like. As she listed a few activities like talking to girls, she said he likes to eat... and a reporter interrupted, 'chicken?' and there seemed to be some laughs.
A totally gratuitous, racist 'joke' at the expense of a mother who just lost her son.
I guess Maher's position is, 'no problem'. I disagree.
BAD political correctness, EXCESSIVE political correctness, is bad. There is good PC also.
We don't need the above example, we don't need to hear Rick Santorum say in a campaign speech 'do you people really want to vote for a N*****'? (He didn't say that, I'm using it as an example of the sort of thing that can come with 'no politically correct' allowed). Do we need the exploitation of bigotry to be more acceptable? Should Maher's buddy Ann Coulter not have been criticized for calling John Edwards a 'lovely human', encouraging the hatred towards gays, as part of 'no problem' presidential campaigning?