I support free speech for individuals as a libertarian matter, but access to political information is an essential element of electoral government. If we're going to talk about government censorship, I think the latter concern takes precedence. In debate as in many things, it is hard to serve two masters. Switching among reasons to oppose censorship can feel like moving the goalposts.
For me, defending our political system gets the job done, or it doesn't. If it doesn't, then what we call "liberty" the leftists call "bourgeois freedoms," and competing victimhoods come into play.