Let us not forget, what "pushed him to the breaking point" was the neighbor blocking his avenues of trespass on their property. ;)
And having to drive an extra 3-5 minutes to take the posted route to his property was apparently enough to manifest some mental illness.
What is scary is how many people have elevated this nut to 'anti-establishment deity'. I assume most reviews are bots these days, though.
TL;DR: Dude get told not to trespass on previously vacant property that is no longer vacant. Dude doesn't want to take posted route, cause that is extra 3-5 minutes from highway. Dude's mental illness snaps, and he armors a dozer to throw and epic temper tantrum.
TFW: Man kill himself over having to drive on the roads.