Another way to see it...
In the UK, a significant percentage of the people that own guns (as opposed to merely handling them as part of their duties) have killed someone, or fired them in anger with the intent to kill someone during a criminal act.
In the US I'd hazard that the percentage of legal gun owners who have killed or attempted to kill someone is very, very low. I'd also guess that most gun crime is committed by people who are already legally barred from owning a weapon, given the highest rates of gun death occur in Washington DC, New York State and California where the gun restrictions are toughest.
See, gun crime in the US follows that sort of pattern. Areas where guns are illegal or highly restricted tend to have the highest rates of gun crime in particular, and the highest rates of crime in general. Where the gun laws are most liberal, crime in general falls dramatically.
This image of the US as a place filled with gun-toting nutcases is largely a creation of the media, which wants to sell stuff and trades on stereotype in order to do so. It's no more fair than their image of us as a land of fruity, plummy toffs in bowler hats and three-piece suits sipping tea and eating crumpets with the vicar in a country cottage whilst cockneys dance and sing about chimneys on the roof.