If he had said, "too bad the waiter didn't poison your drink" then it wouldn't be a topic of discussion at all.
Obviously people think gang-rape is worse than murder by an order of magnitude.
I'd love to see a video, because at this point we don't know exactly what she said to heckle him. She may have said something lighthearted to get a rise out of him, and perhaps him going for the nuclear option just to get rid of her was over the top. Alternately she stood up and was making a stand trying to get him off the stage and said something in a way that suggested she wasn't going to back down. In that case he might have only had the option of engaging her verbally for a long time, ruining his set, or saying the worst thing he could wrap his tiny brain around fast enough in order to throw her off balance, making leaving the only option.
Regardless, it was mere verbal sparring, and if she didn't want to get knocked off her horse, or if she didn't want him to use the R word then she should have made a legally enforceable contract with him prior to baiting him.
They are both idiots, and when she lost she took it to the interblogs to try and get the last laugh, and honestly I'd say she won, so it was a successful tactic. She's feeling vindicated, having more publicly stuck it to him, and he's rolling his eyes at her hollow victory. Is he going to change in response to this event? No. Is she going to become more aware of what she's getting herself into? No.
But who cares? Are we trying to suss out some sort of universal human truth by continuing to argue about what two strangers said to each other in a public setting? Let me know when you've cracked that nugget of truth and rephrased it so it'll fit on a bumper sticker.
Go ahead and be offended, if you want, at something two strangers said thousands of miles away and dozens of hours ago. It's your day to spend however you like, and if you want to spend it feeling hatred and unhappiness then knock yourself out.