The show is funny. The CHARACTERS are funny. If you cannot separate the characters from this or any show, or movie, or music, or art, etc. unfortunetly there would not be much to watch, look at or listen to. Yes, most entertainers are low life scum, just have to separate the fiction from the facts.
Besides, for a real funny sitcom, you need to go back a little to the Honeymooners. As far as I know Jackie Gleason and Art Carney are not commie American hating Jew hating liberals. As far as I know.