My theory about those types of people is that they have a very normal need to be important and that need is currently unfulfilled.

And that's how they get drawn into these phantom wars against the boogeyman of the week, like there's some part of them that says, "I am being a hero! I am doing a good thing even though people are against me!"

It probably also explains that the more people that they make uncomfortable the more deeply they get into the rabbit hole.

The negative feedback provides attention, it provides a source of importance to what feels like an unimportant and worthless life.