one of the things I never get is the randomness of it.
If he is angry with Trump why not take it out on Trump, one of his appointees, or some federal group? or the BLM aholes who are angry at the government but burn down and loot the local 7-11.
maybe he has some beef with the local FD, but that seems stretched because they are the FD. PD would make sense for someone to have a beef with, but the FD? would have to be something really specific, down to an individual in the FD.
I don't see any path where shooting up the FD could improve anything otherwise.