As understand it, the lady is saying that the US has a culture of violence; one in which violent solutions are often preferred over peaceful ones. I believe it to be true. When I was a boy in Ft Worth, Texas; 40 odd years ago, there were 3 "gin mills" down the street from us. They averaged 2 or 3 stabbings a week, about 1 shooting per fortnight, and 2 or 3 deaths per year. That was 'normal'. No one made any fuss to close them down. Yes, I think the US is violent.