It's been studied pretty widely.

https://www.npr.org/2025/10/01/nx-s1-5558304/poll-political-...

> Respondents were asked if they agree with the statement, “Americans may have to resort to violence in order to get the country back on track?”

Agree:

    - March 2024: 20%
    - September 2025: 30%

Disagree:

    - March 2024: 79%
    - September 2025: 70%