[internet_user]

Are you going to cite anything about knife crime not being a problem in the UK?

How do you explain much lower homicide rates in different US states, many on par or better than "every other first wolrd country?

If you drill down deeper, by county level, or even more granular - the picture becomes much clearer still. You should research it, see what variables drive it, instead of arriving at conclusions without any data.

Why do such discrepancies exist, sometimes literally across the street?

The problem is much more complicated than "guns bad".

[rsynnott]

Which states and developed countries are you talking about? The EU28 homicide rate is ~1 per 100,000. NH sometimes hits that; no other US state does. There are about 6 US states <= to 2. The only EU states over 2 are Lithuania, Latvia and Estonia. Japan and South Korea are both under 1.