Oh I don't think there is anywhere, where there is absolutely no violence but I'm old enough where I'm willing to make some trade offs. I lived in Lisbon Portugal for a while and can't remember not being able to do anything there that I couldn't do here (I was newly married so I probably didn't pay attention, lol). My in laws were Portuguese and I don't remember any of them complaining about not being able to do things.
I can safely say North Korea is off the list. there just has to be some sort of middle ground.
gun violence is not the only reason I'm considering it but it does kinda play into it. I have a sibling that lives in St Thomas USVI and it is one of the reasons why his family is staying put. Once again, not the only reason but with small children they did take it into consideration.
I'm not panicking and running for the border, I've got a few years but I am being truthful, when I make my list of pros and cons, our obsession with violence does go on the con list. It's sad to me. I do think in a few years we'll get rid of the gun free zones and then every store, movie theater, beach etc will have hundreds of people walking around packing heat. Just not the type of culture I want to live my old age in.
These are just my opinions, I'm not arguing for or against.