If you're going to pretend it's an actual rape threat, you're going to have to prove:

• He intended it as a threat, not as a rude joke, or a rude proposition
• He knew it would be interpreted as a threat, not a rude joke or rude proposition
• He could reasonably carry out the threat
• She reacted in a way that indicated she felt threatened, not that she thought he was just a rude jerk

Good luck with any of that. He's a well known shitposter who makes rude jokes all the time. He almost certainly thought he was making a joke, which means it can't be considered a threat even if she felt threatened (which she didn't). She's a billionaire with a security detail and a football player as a boyfriend, so his ability to carry out any threat (if it had really been a threat) is nearly nonexistent. And, all evidence is that she just ignored him, not that she felt like she was ever in danger. You'd fail on all 4 prongs of that 4-prong test.

It's ridiculous that I'm seemingly defending an asshole like Musk, but when there are even bigger assholes out there like you, it's what has to be done. You can't just act like anything rude someone says is a rape threat. It's ridiculous, and it diminishes the suffering of people who actually are threatened with rape by lumping their suffering in with people who merely have to deal with rude things online.