I posted this article about political violence from Politico 3 months ago. It got 3 votes and sank. But it resurfaced on their website today because of this event (they revised the title of the front page link to make the subject more clear) so I'll bring it up again:
How Does the Cycle of Political Violence End? Here's What an Expert Says.
(Was: The Kindling Is a Lot Drier Than It Used to Be)
https://www.politico.com/news/magazine/2025/06/02/political-...
The author's point is that political violence does occur in cycles, and one thing that makes a cycle run down is when it gets gets so awful that universal revulsion overtakes the political advantages of increasing radicaloric and action.
He gives examples, which may be within the living memory of older HN readers (like me):
"I can remember back in the ’60s, early ’70s, it felt like the political violence was never going to end. I mean, if you were an Italian in the ’60s or the ’70s, major political and judicial figures, including prime ministers, were getting bumped off on a regular basis. And it seemed like it was never going to end, but it did. It seemed like the anarchist violence of the early 20th century — it lasted for a couple of decades, killed the U.S. president — it seemed that was never going to end either, but it does. These things burn themselves out."
and:
"You had the assassination of the U.S. president, of Martin Luther King, of Bobby Kennedy. And then it stopped. People shied away from political violence. Exactly why it stopped, I don’t know, but it did. It wasn’t just assassinations, it was also street violence. And then things calmed down."
This is not particularly optimistic, but it it's an interesting analysis.