No. I know it's hard for many around here to walk and chew gum at the same time, but it really is possible to despise political correctness without tilting over the edge to say bigotry of any kind is OK.
What Gibson said was bigotry. If he had spouted the "N" word what would you reaction have been? That is a really brilliant move: you are stopped for drunken driving and you insult the ethnicity of the police officer - way to go, Mel. That will really make sure he doesn't haul your tush to jail.