I side with the comedians. If its a joke, it's a joke. They can say whatever the hell the want. If you don't like it, don't go to the show. If you're offended by foul language and harsh topics and that is what is in a comedians routine, don't go to the show. Comedians can talk about whatever they want to talk abou in my opinion.
And kramers ordeal wasn't about a joke, it's how he got into it with hecklers.