I wouldn't be so sure of that. Note how they worded the letter. Namely the stuff about how this is aimed at hamas and 'hamas propaganda' as defined by the US government and making it a specific point to mention how they're legally recognized as a terrorist organization and have been since 1997. Note that in the US you do not have a righ to 'free speech' that actively promotes terrorism or a terrorist organization. That shit will get you a visit from the feds and a prison sentence if you don't stfu about it quickly. This changes things and could allow the government to invoke any number of anti terrorism laws to go after musk and twitter claiming they're actively supporting hamas as a terrorist organization, disseminating their propaganda and siding with them against israel. Hell there is probably some law against US companies doing shit directly against israel the feds can use to start shit if they want to. Point is, this is one of those situations where if the feds want to make an issue of it and cause problems for musk and twitter they very much can. No matter how sketchy invoking anti terrorism laws to do it might be