The "Punch a Nazi" event in the United States was an interesting phenomena where Richard Spencer (A self titled Identitarian) was punched by an anarchist generating the question "Is it OK to punch a Nazi?". Were there any polls done to evaluate the general attitude surrounding this issue in the US? I see many articles regarding the issue, but no polls asking people whether this action is OK or not, and not their response.
The right-wing Cato Institute did a survey about punching Nazis.
According to the survey, only 32% of the general population say that it is morally acceptable, and even among strong liberals the number is only 51%. Old white people are less likely to approve of punching Nazis than non-white or young people.