When I first joined this site, it was because I was ill, I couldn't work, and i was going out of my mind with boredom. I had lung cancer (I got better) and was getting radiation treatments daily, and chemotherapy weekly, and a boatload of other expensive health care shit.
I have what's considered very good insurance through work and there wasn't a single treatment, procedure, or medication that was not preapproved as "fully covered" by my health insurance company. But the shit they pulled to get out of paying what they had agreed to pay was astounding, for months and months it was practically a full-time job for my wife doing battle with these pricks, it was traumatic as hell for us both, all to get them to do what they were supposed to do, what they had agreed to do, what they promised the cancer treatment center that they would do, but in the end, I was screwed over by well over a hundred thousand dollars.
Point is, I spent a lot of time wanting to kill people at that insurance company, if I were a little more violent and a little more unhinged, (like MAGA violent and unhinged for instance), I could easily see doing what this guy did, they certainly make you upset enough.
I'm not condoning it by any stretch, I'm certainly not saying they deserve it, but it's easy to see how they could drive this guy to doing what he did. Especially with the words on the shell casings they found, I'll bet you anything he's got a story like mine to tell, or an even worse one, maybe lost a loved one or something because of those pricks, and that story explains his actions and, in his mind, justifies what he did.
Not only am I not at all surprised by what happened, I'm kind of surprised something like that doesn't happen every fucking week, again, not saying healthcare companies deserve it, but they certainly push people to the brink enough to make something like this happen.