I wonder how slightly different wording of that question, or prompting with examples would alter the numbers. 23% is higher than I'd expect for the question as it was worded, and yet I wouldn't be surprised to see a 50% number if a pollster linked it to a specific hot-button issue.

My personal belief is that we're on a downward trend for political violence. Mainstream media acceptance of violence was very high when it was associated with BLM protests, with violence being "the voice of the unheard" and a valid reaction to an unjust judicial system. Perhaps peaking with California's Maxine Waters pretty clearly calling for violence if the Chauvin trial didn't have her desired outcome.

Fortunately, after Jan 6th, the mainstream media did a hard 180 on their treatment of political violence. Obviously there will always be fringe elements agitating and exaggerating, but it looks like the mainstream narratives now are more about fixing the system and/or working within it, rather than burning the system down or using violence to intimidate the people in the system to appease protestors.