Honestly, while I think CSAM is disgusting, I am kind of against government censorship of it. Some go so far as to ban anything resembling CSAM, including imagery that looks like it, but doesn't actually involve a real child. The problem is the abuse required to create it, but if that abuse didn't happen, there is no crime, and it should therefore be completely legal.

The same goes with free speech more broadly. The speech itself should never be illegal, but it should be usable as evidence of another crime. A threat of violence is the crime, and that should be prosecuted, but that shouldn't mean the government should force the host to censor the speech, that should be at the host's discretion. What the government can do is subpoena information relevant to the investigation, but IMO it shouldn't compel any entity to remove content.

That said, Brazilian law isn't the same as US law, and X and Space X should respect the laws of all of the countries in which they operate.