So, as weird as this is to say after I joined with others in telling you your question was bad / unfair, I actually think pretty similarly to you in terms of the value of free speech. I have an instance set up which I've been neglecting as I work on some other projects, but once I get time to get back around to it, I plan to operate it as a semi-production server, and to federate with some of the "banned" right-wing instances mostly out of curiosity to see what's on them.

If you're interested in an account on my instance, send me a DM and let's talk, as I do somewhat support your mission. Just I would repeat that as far as I can tell, defederating in practice has not a lot to do with "free speech" and more just with operational sustainability (choosing who to federate with not because you object to what's being said on certain servers, but just as a matter of keeping illegal or clearly destructive behavior off your instance so that it can continue to function well.)