Earlier quoted context omitted.
I don't know what Kikifarms is/does/has. That said, what do you do if you are asymmetrically attacked by activists? Are you automatically in the wrong?
No, but Cloudflare and several other ISPs will not drop you simply because a large volume of people complains. This doesn't work like Twitter moderation. The quality of these complaints warrants not wanting those people associated with you.
Yes they will. This is the example of them literally doing exactly that.