Two points:

'Tain't necessarily so. Illinois (Chicago) has extremely tight gun laws but has a high rate of gun violence.

Washington, DC, the same.

As long as neighboring states have lax gun laws and controls access to guns is easy.

2nd Point

I am most awfully tired of the UK citizens' (subjects?) insulting use of the brainless 'banging rocks together.'

Unless and until you lot understand more of cultural and historical diversity in a huge country ya dun know what you talkin' about.