It's not NSFW (as far as I know). It's far worse. It seems to be a web forum that's into harassing minorities, sometimes to the point of suicide. Worse, it may be harassment with the intent of causing suicide. It's appalling.
Not exactly (at least I hope not). I think they're defending the rights of cesspools to still have freedom of speech.
(Except it's not government restrictions, so it's not exactly First-Amendment-style free speech.)
(And, in defending KF's right to be on the internet, they're defending other businesses being required to carry them, which is... free speech for KF but not for people like Cloudflare.)