@ZachWeinersmith I suspect it's because communities tend to self-reinforce behavior. Fedi is not Twitter and it attracts people who want something not Twitter and people conform to the non Twitter behavior.

90% of online forums have toxic behavior (I just made that number up) but I'm on one forum where everyone's really nice and I am not sure why but I don't think it's the forum mechanics. I think it's just how social behavior works.