Violent crime in the USA is at rates about 50% of what it was 30 years ago. The USA is actually a much more civilized country than it’s been for a long time! We just hear more about the problems thanks to the ease of communication nowadays.
Yes, and it always has been. The murder rate per capita in the US has consistently been 5-10x higher than in Europe for the entire 20th century. Long before gun control, social safety nets, the drug war, or any other difference you might want to blame. The US is a low cohesion, high violence society.
As someone who grew up in the US, lived in the EU, Australia and NZ for a number of years, I can say on a day to day basis, it's still pretty much nothing.
The average American rarely ever has to directly confront violence. I've even spent years in major metropolitan areas and the majority of people don't walk around each day anticipating violence. My sister got mugged once, in our small home city, like 20 years ago. I've never personally been mugged or assaulted, but I did have one break in while in NZ (they took all my electronics) and I had a bicycle stolen in Australia.
I haven't lived in "bad parts of town" through (although friends told me I lived in a bad part of town in two places I lived in; but I really feel they were exaggerating) and in high crime areas I'm sure it's different.
But the portrayal the rest of the world sees of America is through a very limited lens. And German or Irish or Chinese person who comes to visit the US will see kids playing in parks, people in the cities walking to work or lunch, others browsing through stores or pumping petrol into their cars and it will generally looks pretty much like every other part of the mid/high income industrialized world.
I spend about 8 months/year in the United States (Silicon Valley) and 4 months/year in Israel. I do "feel" a bit safer in Israel than the U.S. (for example I don't like travelling in San Francisco. I fear for personal safety on the streets and on Muni, and you have to garage your car otherwise it will be broken in to).
But I don't feel like I'm going to get shot in the United States. I have never even heard gunfire in the U.S. (off the shooting range!) and I've lived in Brooklyn and Manhattan, too.
New York didn't even had a (public) police force until the 1850's, with 300k inhabitants. And there was literal brawling between competing police forces for during the first years.
https://www.pewresearch.org/fact-tank/2019/01/03/5-facts-abo...