They host and indirectly disseminate media, just like a news network. Do you expect Fox or CNN to host views they don't find acceptable? If we're going to accept that biased media is legal (news networks) then biased media is legal (Cloudflare), although you'd have a harder time making a case of bias against Cloudflare in comparison to the former.
Fox and CNN are indeed liable for what they display because they are publishers. They control the content.
That's kind of the point.
Cloudflare and social media co's naturally want to be protected as a platform. If they start controlling the content in an ad hoc it's a lot harder for them to claim that.
