What "trade secrets" does he claim were stolen? Obviously ex-Twitter employees who move to Meta know their tech stack. But there's not a chance that their codebases are compatible so even if someone directly carried cover over from Twitter to a new job at Meta, it's not like it would be useful.

And if he thinks current Meta employees are still accessing Twitter IP/code/etc, Elon probably needs to first look internally and maybe not fire entire security & compliance teams.