Lemmy devs may have controversal political views, but their software is written with a good intention. KiwiFarms on the other hand use it to target instances.

Let's go even further than that. Let's say that the most annoying people around the whole Fediverse are Hexbear. On the worst days, all they do is to organize to spam specific threads, which is indeed annoying, but that's the extent of it. KiwiFarms is responsible for harassing people until they commit suicide for the heinous crime of being weird. Anyone aware of this who wants to associate with them has no place in civilized society.