Heemeyer wasnt focusing aggression towards people who had wronged him. For starters, the Granby city hall is (was?) also the public library. He may have perceived his targets of homes and businesses as "enemies" but most sane people would be surprised he thought that. That's according to the people who knew the situation anyway, I wasnt there I just watched the documentary. Its seems a lot more like a mass shooting to me than it is like Oklahoma City or Kaczynski.

Kaczynski actually targeted random people. Heemeyer had a chip on his shoulder for sure. If he had gone about the politics of a small town with a little more tact and finesse he would've probably not had all the problems he wound up having with his neighbors. But he was wronged, by the town government and by prominent people there, they just thought he couldn't do shit about it. They made enemies of him of their own accord and he didn't harm a single person, just property. I can't equate that with a mass shooting of random people. The most I can say about it is that it was overzealous.