Exactly. It is perfectly legal for a private entity (such as Twitter) to engage in censorship, as they regularly do so. So, the argument that "we can't do that, because that would be illegal" doesn't really fly.
Furthermore, there is already a precedent here: both Telegram and Meta have been previously (temporarily) banned from Brazil until they decided to comply with judicial orders (after which, they were unbanned again). Why does Twitter think they are special in this regard?
If the judicial order is (correctly) justified by an inconstitutional law, then it's that specific law that has to be challenged, not the judicial order.
Furthermore, there is already a precedent here: both Telegram and Meta have been previously (temporarily) banned from Brazil until they decided to comply with judicial orders (after which, they were unbanned again). Why does Twitter think they are special in this regard?
If the judicial order is (correctly) justified by an inconstitutional law, then it's that specific law that has to be challenged, not the judicial order.