> Trust in society is failing
Something that I've observed happening throughout history is that in some sense "too much civilisation" can be a bad thing long-term.
I knew someone in the army talk about how some officers wouldn't survive the first week of a real war. Not because of enemy fire, but because given the opportunity, the men under their command would almost certainly take advantage of the "less civilised nature" of the battlefield to take out someone they despise enough to murder, but not quite enough to risk it in a civilian setting where the tolerance for unsanctioned lethal force is essentially zero.
Something similar happens outside of militaries too, where truly horrible human beings[1] can cynically utilise the enforced peace of civilized countries to do incredibly evil but legal things. The Sacklers come to mind as a prime example. They knowingly and deliberately sold highly addictive drugs marketed with brazen lies and killed about a hundred thousand Americans by some estimates. They are above the law and totally immune to all consequence, personal or otherwise. No violence will ever be done to them! Anyone that tries will be severely punished, because that upsets the "order" of civilised society where the rich and powerful can massacre millions, but the plebs can't ever lift a finger against even one of their cartoonishly evil oppressors without severe personal consequence.
"Conservatism consists of exactly one proposition, to wit: There must be in-groups whom the law protects but does not bind, alongside out-groups whom the law binds but does not protect." -- Francis M. Wilhoit [2]
Sociopaths loooove civilised societies! They can mercilessly exploit people while basking in the protection of the law. As long as what they're doing is technically legal, they can get away with almost any amount of evil acts. This does take a while to build up! Norms, expectations, and the like keep the worst of the worst initially at bay, but these things slowly erode as more and more sociopaths take greater and greater advantage. (Cough-Trump-Cough)
This, taken far enough, where the common people are stepped on hard enough by those they can't ever bring to justice can result in entire societies just... snapping in their rage. They just need the opportunity, a "push", or some enabling event. In the case of the "friendly fire incidents" taking out bad officers, its a war. In most societies it is starvation or total economic hopelessness. We all know what this leads to: the French revolution is the prime example, but many others exist throughout history.
The failure of the United States is that its reigns of power have been completely and utterly captured by the increasingly corrupt elite, and there is nothing the common people can do about it. Frustration is growing, slowly, but surely.
It's not quite at the boiling over point, not yet, and may take a century to get there, but given the direction things have been heading, it's just a matter of time until the people take their anger out in some direct manner.
Trump might have started the first pebble rolling by causing an oil shock. And gas shock. And fertilizer shock. I'm sure a lot of hungry, cold people who can't even get a job because the AIs have replaced them -- and used their cooking gas for energy -- will be perfectly fine with this and won't ever do anything about it! That would be uncivilized!
[1] Disclaimer: Sam Altman is no saint, but I don't think he's anywhere near the level that he'd deserve mob violence.
[2] At some level the people commenting here that it's shocking and horrifying that anything violent ever happens to a billionaire CEO are betraying their right-wing leanings. Conversely, the people arguing that the elite shouldn't be above personal repercussions for their actions are strongly left leaning.