The difference is nobody on Null's forum would care if he did domestic violence, which is the thing that finally did Lowtax in after years of him acting sleazy and berating his own users. Null's already stress tested the psychos on his board and they don't have typical morality, they're not people who care that he has crazy beliefs about white genocide or the fact that he's a "free speech absolutist" who thinks you should be able to post cp up to the clothed lewds of actual children that were allowed on 8chan. He's never apologized for any of that, in fact over the years he's doubled down on it and is only upset it drew negative media attention. KF's users only turn on Null if he does something to them personally, like banning them.
Even the women in BP who wring their hands about womens issues have already done this schizophrenic reconciliation in their heads about him that allows them to keep posting there, because how are you seriously going to be a feminist while involving yourself in a "community" established by the freak who admined 8chan?