German cities are just as built up as any in America.
Yes, and for the most part they are filled with Germans.
Socioeconomically comparable parts of the US, ie. Vermont, tend to have crime/police shooting rates similar to or less than comparable parts of Europe despite the fact that any law abiding citizen 21 or over in Vermont can pack a concealed handgun in their pocket anytime they wish; no records, permits or training required. It'd be instructive to know how many Cops have had to even drawn weapons in Vermont, let alone shoot.
Likewise step across the state line into adjacent areas of New York State, where handguns are closely regulated, and I'll doubt you'll find much difference, in anything. It ain't the laws, its the people.
I can say this as a guy who grew up in urban Working Class England, and who now lives and works in a high crime area of a major American urban center on a residential street where at least two drive by's and a fatal shooting have occurred.
Mike