Nice way to frame the issue Simon! I haven't been in the states for several years, but my first thought was: what kind of country has it become where people feel it is normal to be armed when going shopping? Here in Poland, besides criminals, only military, police or hunters have weapons. I could get one if I went thru the required training, screening, paperwork, etc - but I don't feel the need. Death by guns here is orders of magnitudes different than in the US (for some reason) and 30% of the ones we have are suicide related.
When I go to Tesco (Walmart equivalent) to buy some dog food, the last thing on my mind is: where is my heat?