offending people has bercome the goal.
You make a compelling point, but it turns out that to some people that's funny. That is merely another type of humor for them. Off-ending people. They believe its funny to annoy and upset others. To tip and trip them up, make them feel uncomfortable, and cause them to question their assumptions and beliefs.
To some degree it's a bit like sarcasm. Some people will never find it funny, and can't possibly understand why others would find it funny.
But the reality is that people view things from fundamentally different perspectives. Something that would offend me might not offend you. If you don't find it offensive, you might find it funny because you know me to some degree, and therefore it becomes an inside joke.
Well known inside jokes that are offensive to some might include racist jokes like certain ethnicities/races preferring fried chicken, or other ethnicities/races being known as penny pinchers.
So then the question is not whether being offensive is the objective and thus the "bad" type of comedy, but whether the intended audience accepts it as a joke at the expense of those that would become offended.
If we got rid of all the jokes in the world which can only occur at the expense of another human, I think we'd eliminate most jokes. It's often when we identify our own foibles and poke fun at them that some humor occurs. I particularly enjoy self deprecating comedians, but that doesn't mean I don't laugh at the jokes at the expense of law enforcement, TSA workers, and programmers.
It's not funny that he suggested rape as the answer to her heckling.
It's funny that with one single sequence of words he was able to completely shut her down and get her to high tail it out of there.
He didn't threaten her. He didn't punch her. He didn't do anything but use his words.
And people laughed not because they were all imagining her getting raped. They laughed because she started a fight and lost so completely that she fled. She didn't flee in fear, she fled due to complete humiliation.
And once she found a safe spot away from him behind the Internet and the specter of rape culture, she renewed her attack and said he was a bad comedian for humiliating her so badly she couldn't keep her resolve and she fled with her tail between her legs.
She's not trying to stop rape culture, she's trying to get back at the guy that humiliated her in front of a few hundred people so badly that they laughed at her on the way out the door.