@jjmacnab
Too bad he's got idiots for lawyers, if he has any at all. The Center can choose any venue in the country with the most robust anti-SLAPP laws, file a suit in expectation of Musk's suit on the strength of his threatening letter, and force them to show their evidence that there is any basis for their suit -- and then pay the Center's legal fees when there isn't.
Or the Center could wait for a lawsuit and collect some very sweet discovery.