[ahhhhnoooo]

Someone hurt this person, I suspect. And it has left them bitter, resentful, and angry at anything that gets in their path.

They probably don't like that someone is challenging their ability to be neighborly, follow the golden rule, etc. because it conflicts with their mental model of themself.

I hope someday they will introspect and realize that we are all humans, and all humans deserve wellbeing, even those whose choices, opinions, or situation we disagree with or find unpleasant.