The US has what from the outside looks like a very odd combination of:
- violent anti-government rhetoric (not a new phenomenon at all)
- huge availability of guns
- explicit links between the two by second-amendment advocates of violence against the government
- very little of what would normally be called political violence (Jan 6 is an exception, but a significant one)
- a huge amount of "radicalized" gun violence against schoolchildren (Columbine to Uvalde, etc)
This doesn't feel very stable. It relies on people's actions never matching their words. As soon as someone turns a gun on an elected representative there's a risk of the situation escalating. Or someone could independently reinvent the carbomb, a common factor in situations from the IRA to Iraq.