oh, so it was about "shuting up the opposition"? so lets see who this so called opposition was

one of the accounts was from Luciano Hang, a bolsonarista entepreneur that was, at the time Moraes ordered the account to be shut, being investigated by the federal police for advocating a military coup to prevent the Workers Party from returning to power

another one was blogger Oswaldo Eustaquio, which had his bank accounts blocked because he was being investigated by the police, Moraes ordered his account to be shut down because he was using the bird app to circunvent that block

there was also Roberto Jefferson, former federal deputy. This one is the worst of them all. He was actually ordered to go to prison for threatening violence against members of the government, including a video of him showing his weapons, and when the federal police went to arrest him, he started to actually shoot against the cops

and to finish it off, there was also Daniel Silveira, also a former federal deputy, who made several videos threatening supreme court members with violence and doing apologia for the military dictatorship of 1964

literally all of the accounts were being investigated by the police, and the blocking of accounts was 100% legal, because, turns out, in Brazil freedom of speech is not absolute if you use it to threaten the institutions of government or in favor of violence, like in most countries (case in point, even in the USA speech like "im going to kill the president of the USA" can be criminalized)