Disclaimer: indifferent at best to musk, probably more dislike than anything else, but not with vitriol. So I read that this is all because musk refused to appoint a Brazilian citizen as an X representative, as dictated by Brazilian law. I have not verified this part. Musk refused because the last person to fill that role had all their bank accounts frozen by the judge. The judge also cut off payments from Brazilian…
The root of the issue is that Alexandre de Moraes, a single justice on the Supreme Court, has been issuing secret orders to censor content, ban accounts, and jail people over political speech. This is unconstitutional in Brazil per article 5 of the 1988 constitution, so X refused the orders. Note that the text of the Brazilian constitution explicitly says that the freedom of expression is guaranteed without censorship (it mentions “censorship”). If they were legal orders they would have complied, as they have in other countries.
Also the “Musk refused” part isn’t accurate. Ultimately these decisions are made by Linda Yaccarino, CEO of X.