Jesus christ, no, she can’t argue that it’s self defense. What is the imminent risk of physical harm to the mail carrier here? Self defense only applies to cases of immediate physical harm, and that’s just not this. At best there’s an argument to be made for very, very indirect harms.

This is every bit as dumb as arguing that someone waving a Nazi flag means that you can self-defense them to death because they’re going to hurt someone eventually.

It’s not my job to pull down Nazi sticker crap or clean it up, but I do.

Good, and you should. But that’s you acting in your personal capacity, not as an agent of the gov’t.