Was he asked to delete them. Or possibly deleted for him?
The story was that he got into a Twitter discussion with the guy who’s in charge of WhatsApp. He said Musk should delete his FB account “if he’s the man”. Elon didn’t even know SpaceX and Tesla HAD FB accounts, so he said “Will do”.
It’s known that Musk and Zuckerdweeb have had differences on stuff in the past.