Just to respond to point (6): From the blog post, there is a link to a post from someone moving from fosstodon to hachyderm that says:

Overall I'm satisfied with the moderation process and neutrality on Fosstodon. What to do? As a Fosstodon user, it's hard to see any future path with the instance that works in my favor. (...) Most will never know anything about the name other than "the instance which allowed a nazi mod". While I believe the characterization is 100% untrue and unfair, the die is cast for lots of people.
If I stay, the likely outcomes are:

• Limited communication with some other people, because some other instance mods will choose to block Fosstodon
• Will have to explain my choices and the highlights of this post any time someone says "eeeww, Fosstodon", occasionally and probably forever
• Some people will incorrectly assume I hold certain views based on my association with fosstodon

So, yes, at least one person is moving to another instance not because they are particularly against the admins, but for fear of being judged by association.