the short of it is beehaw is a selective community that is fairly liberal and expect people to be respectful to each other. That is the alien concept of a lot of reddit refugees and hence beehaw has to leave the larger federation of lemmy/fediverse and that means you won't be able to see their topics here (say lemmy.world). A lot of people seem to be mad that they're doing it and saying angry things about it. There is a possibility when they get better mod tools they can return, but for now there is simply not enough mods to control the refugee trolls.