PB, it's a matter of numbers. Whether it's Throggs Neck or Vatican City, as the population increases, components of that population increase. When the US population was 180 million, 1% of it constituted criminals (or some type of violent people) was 1.8 million spread over 50 states. With a current population of over 300 million, that 1% has grown to 3 million to spread over the same 50 states.

It's not going to get better.