The trolls and fascists do not exist on Twitter to hang out with other trolls and fascists. They're there hunting for liberal tears. When their prey leaves, they follow.
Bluekky has been open about not moderating their platform. They've provided users tools to not see the shit they're letting through the door -- which, yes, is currently better than Twitter, where the current ownership believes that 'free speech' is deserving of a captive audience -- but if the bsky algorithm thinks you have something -- anything, really -- in common with the Nazis, they'll get shunted into your timeline, leaving you to play wack-a-mole.