Every comedian has a meltdown at some point, probably more than once. It happens. Everyone loses their shit from time to time. Only when a comedian does it, it's much more noticeable because you're paying money to watch it. Comedians and performers of all kinds it seems are constantly apologizing for their behavior.
Personally I think sometimes it's the audience that should apologize. I understand you're sensitive sensibilities and everything, but you can't go to a comedy show and get offended. You just can't, and if you do, keep it to yourself. Comedians say things because they think it is funny and will make people laugh. They may not always be right, but so what? You know how you let them know that? By not laughing, and that is enough. If a comedians joke continually does not get laughs, he/she will stop telling it (usually).
Recently I was at an open mic trying out a string of jokes about DUI's. The microphone broke, but the room had good acoustics so it was going decent despite the lack of a mic and a decent crowd. However after one of my jokes a girl in the audience yelled "not funny." That 's fine that you think that, but there's no need to tell me and the whole room that. I don't go to your job and tell you how to (insert any job that's degrading to women grind a pole, serve drinks on a plane, serve anything...you get it).
Now really I should have just let that go, but it was so rude, and I couldn't. I can't remember what I fired back with but she didn't like. We went back and forth for a while and she was not a good sport, which is another thing. You should never yell out at a comedy show, but if you do you better be ready for what's coming. If you don't like to get picked on then shut the fuck up. She got angry, said I wasn't funny multiple times,I got angry, my set went downhill. I got offstage and her and her friends let.
I didn't feel bad, I wast just pissed. Pissed at how she acted and pissed that I let it get to me. Sometimes the hardest thing to do it let a comment go. That's probably what I should've done, but on the other hand she deserved it, and sometimes, if not most times, they do.