> Moreover, they've gotten threats from their ISP that they have to delete certain posts or be shut down. (which seems scary to me)
Agreed - though I find it's more of a headache than scary. On end, I don't like the fact that increasingly internet infrastructure is acting as a de facto judge in deciding what speech is and isn't allowed. I empathize with both parties. ISPs don't want to host speech they feel is abhorrent, and I'd probably do the same thing were I in their position.
I'm much more accepting of platforms like Facebook, Reddit, Twitter, et. al. taking down groups and banning members than I am of infrastructure providers doing the same. The former kicks people off of large communities, but people can still put together their own websites. When it gets the the point that I might not even be able to serve plain HTML that I wrote myself, because nobody will even let it go through the wires that's when I start thinking utility regulation in ISPs, DNS, etc. is necessary.
Cloudflare's CEO was very humble when taking down sites. When talking about taking down the Daily Stormer, "Literally, I woke up in a bad mood and decided someone shouldn’t be allowed on the Internet... No one should have that power.” [1] I largely agree, though I'd offer the caveat that something needs to have this power but it should be an institution like the courts rather than individuals in corporations.
1. https://www.cnbc.com/2017/08/17/cloudflare-ceo-says-removing...