Lemmy.ml is a massive instance. I don't really know where are you posting there, probably in political communities and thus this reaction. But I follow lots of communities that are hosted on Lemmy.ml and they are just normal communities about their topics, normally technology. I certainly do not want to lose those communities of having to move my accounts around just because you had some problems with some particular people. Block them yourself and move on.
I don't get why there's always people in small places that are always doing their best to make them even smaller. Lots of goods things are lost this way. We must be clever in trying to preserve and make this good things thrive. And, believe me I've been in lots and lots and lots of small community driven projects, this kind of attitude is no good for them. You cannot take every small issue you have with some part of the project and say: "we do not work together anymore".
If there's an issue let's be constructive about it. But defederation of such a big instance with so many people and communities that just does not care about this drama... I don't see how that helps lemmy as a whole.
I suppose there's a lot of political ideology behind what's being ask for, and what's being said. So I do not expect convince OP of anything, as those hard as steel political beliefs are inmutable. But I hope sanity and a wish for making Lemmy a big project of the kind of social networks we want in the future will prevail. Even if that means sharing space with people you don't politically agree 100% about everything, because that's how a community works, different people working together.