I still don't understand how anyone here (or on the internet in general, for that matter) is still asking "Is Elon stupid? Is he a moron?" in response to stuff like this.
Elon's a jackass, but he clearly knows what he's doing with this. He's inciting political violence and then acting like it was an edgy joke as a way to give himself probable deniability. Dude's an asshole, but he's not literally brain dead.
I know there's always a relevant XKCD, but man talk about specific!