Regarding NixOS, I'm mostly afraid of them going on a user purge after their developer purge. You just never know who this group of people will come after next, especially after they started defining "Fascism" as "anyone asking for how they define Fascism".

And the jump of getting rid of people you hate who contribute to your project and you can do little harm to, to getting rid of people you hate who are of no use to you and you can do genuine damage to (e.g. by installing a tor exit node) is a step down if you think you could get away with it.