There are other streamers who have a cult like following that isn't toxic. Some of the Twitch streamers pull this off, if the streamer has mods who wield the ban hammer hard and earlier, it is possible to shape the community that grows up.
All of the cult of personality type of streamers are going to have a viewer base that is a bit odd, but they don't have to be malicious.
As an example, one community I'm part of decided one day that we were going to play punk music on stream. Since on Twitch, $=free speech, music requests are $3 a minute or so.
It (de?)volved into a battle of the bands as fans of different bands went back and forth.