The order to block Twitter went to all Brazilian ISPs, and Starlink is the only one that didn’t comply on Saturday. So the escalation stems from the disregard of an order that everyone was required to obey, but the intertwined nature of both companies being controlled by Musk is both part of the reason why SpaceX would even consider not complying with local law in a country it operates in, and why the Brazilian courts seem to be willing to aggressively enforce their own orders.
Edit: I’m convinced. This comment as originally written presented the facts out of order.
I’ve looked closer (at other articles, too). You’re right - the freezing of the SpaceX accounts came from the same order that ordered that Twitter be blocked, and before SpaceX announced it would refuse to comply.
The proper thing to do is to recognize the legally distinct personhood of SpaceX, which isn’t part of Twitter, even if Twitter/X itself is wrong on the law.