From Musk's recent interview with Bloomberg [1]:

“I have made the mistaken assumption—and I will attempt to be better at this—of thinking that because somebody is on Twitter and is attacking me that it is open season,” he said in an hour-long interview with Bloomberg Businessweek for this week's cover story. “That is my mistake. I will correct it.”

It seems like Musk ought to be smart enough to generalize from "Twitter" to any sort of media (I don't think Unsworth is on Twitter), but I guess maybe he's still working on it.

[1] https://www.bloomberg.com/news/features/2018-07-13/-the-last...