Censorship is saying that you aren't allowed to say something out in the open. The fediverse is a wonderful place, where anyone can host their own server and say whatever they like out in the open.
There is nothing though that says that any one of us are forced to host your opinions, and none of us are forced to federate with a server that does allow it. In short, you may have the freedom to say what you like - but we also have the freedom to choose not to listen to it, and the freedom to not host it. None of that is censorship.