An important tenet of the American ideal of freedom of speech involves specifically protecting unpopular speech, allowing people to express minority viewpoints without fear of suppression by the majority.

By this standard, Cloudflare's censorship of TDS is far less defensible that Blizzard's censorship of blitzchung. Saying that speech within the mainstream should be allowed and speech outside the mainstream should not be allowed is a violation of this tenet. If you support freedom of speech, you should support TDS's right to speak as strongly as blitzchung's.