I believe Musk would censor anything that upset an authoritarian regime if it aligned with his business/political interests. I don't believe his arguments are in good faith.
Attempting to enforce the laws of our country against foreign companies that operate here is fair game. We have some leverage. We can have a debate domestically about if we think this should be enforced or not.
Personally I don't see a problem with protecting victims of crime, their families and community whether it be child abuse material or graphic video of violent crime. I struggle to see a public interest or freedom of political speech angle that would justify a reasonable individual or company ignoring a sensible request to cease distribution.
Not all censorship is equal nor all enforcement mechanisms. We need more freedom here to criticize public figures as our defo laws are bonkers. Also the government should not attempt to apply wrong-headed technical impediments that would have unintended consequences because they don't have sufficient expertise or the foresight to understand such actions.