Also, those accounts were used by people who were investigated by the equivalent of the FBI, the Policia Federal (PF). The initial request to block those accounts AFAIK came from them, and the fact that this case ended up in the hands of the Supreme Court is because Elon decided to play chicken, escalating the situation in every possible way for seemingly no good reason.

That may make the Brazilian government less authoritarian, but that doesn’t make anyone else more authoritarian. If anything, the fact that Musk is opposing even a very small act of authoritarianism would suggest that he is very strongly against authoritarianism.

Why does he allow this to happen in Turkey however?

Could it be because Steve Bannon is a personal friend of the Bolsonaro family?

In Turkey this wouldn't fly for even a second. He thinks he can make an example out of Brazil (and it's clearly striking a nerve even if it ends up not working out.)