I don't think attitudinal surveys are of much value here. If you ask someone whether they support murder very few are going to give you an affirmative answer. Even people who advocate for political violence will jump through wild rhetorical hoops when challenged about it, eg arguing that communists aren't people and therefore killing them isn't murder.

I think it's better to look at the actual incidence of violence than to extrapolate from weakly correlated leading indicators.

https://www.journalofdemocracy.org/articles/the-rise-of-poli...