First: huh? I’ve never come across a Nazi on this platform. The one prominent Nazi instance was defederated very quickly by many other instances, including mine.

Second: there’s a difference between having Nazis/being slow to remove them, and proudly declaring you won’t remove them. Both are bad, but one is so much worse. Reddit, for example, is the former. Very friendly to Nazi viewpoints, but will at least hurry to remove them once it starts getting media attention.

But most importantly: Lemmy isn’t one site. It’s a federation. You could at most talk about one instance or another, or a group of instances, which “refuse to root out Nazis”. Saying “Lemmy refuses to root out Nazis” is a sort of nonsense statement, like saying “the Internet refuses to root out Nazis”.