Based on some opinion articles, there’s something to add: Xitter is bleeding money, fast. Closing Brazil’s office may be just a business move to limit costs. Doing it this way may be a strategy to limit the damage of admitting that the business health is in bad shape. With the added benefits of attack Brazil’s institutions and causing chaos that could benefit the far-right here.
I think you can block entire instances as a user. But, if not, you can create your own instance and federate with only the instances that you like. Far more work though.
Here: using Thunder.