[elihu]

It might be. It's hard to say, probably even by legal experts (and I'm definitely not one).

I think a sticking point might be that the letter talked about bad behavior by Elon Musk in public, and a problem with the "no assholes" policy being vague and inconsistently applied -- but there weren't any concrete examples.

Possibly some things Musk has tweeted might reasonably be interpreted as creating a hostile work environment or something like that. But maybe he just shared an opinion the authors of the letter don't agree with. Or they're annoyed at him for smoking weed in his Joe Rogan interview. It's hard to know for sure. (Maybe SpaceX employees already know what all the elephants in the room are and it wasn't necessary to enumerate them, but as an outside observer it's hard to know the full context.)