So going back to the bomber, he apparently had his house foreclosed on him and was working as a pizza delivery man in some of the years prior to sending the bombs. He was an avid Trump supporter and attended rallies and all.
I think, if anything, he's a prime example of defining where sympathy begins and ends for Trump supporters. He's not wrong to have some resentments towards the world. He lost his house and was working one of the worst jobs it's possible to legally have. He probably felt, with some serious legitimacy, that he had been denied access to a normal, healthy adult life.
But, the sympathy ends once his insane conspiracy beliefs begin. Crosshairs on Hillary/Michael Moore on his van? Clearly buying into Qanon conspiracy stuff, attacking Democrat donors like Soros. Nobody knows how to combat this ridiculous propaganda machine that takes these people's real problems and directs their anger at Democrats. And since there is zero reason to suspect their lives will improve, what are we to expect? How do you combat this sort of radicalization?
Trump keeps saying the economy is great, when many people are working crap jobs for nothing. What else do they have to believe in, other than that somehow the Democrats are still holding them back? It's madness and I can't see how it's going to get better.