As I have mentioned before, Clanad argues eloquently in favour of the system over in the US,and it is useful to me at least, as a UK citizen, to get some US perspective on this issue.
Here is what I do not get though. The figure of 40% for guns purchased without a backgrond check may not be accurate - the figure might be as low as 20% - but why are you willing to countenance ANY sale of guns without a background check? And if the measure were in any event so unlikely to impact, why vote it down, against the majority wishes, it would seem, of the US population?
And yes, the sheer volume of guns in circulation might make controlling the private sales market extremely difficult - but is that really a reason to do nothing? This from the residents of a country that pride themselves on a can d- , get up and go,frontiersman spirit? Ban advertising of guns in media outlets, punishable by a fine. Pass a law that says guns can only be sold via authorised gun dealers. Declare an amnesty for people to hand in guns.
This is what happens when someone goes on a rampage in a college without a gun, but with a knife - 15 hurt, none killed.
http://www.usatoday.com/story/news/nation/2013/04/10/campus-knife-attack-fantasy-stabbing/2071913/
Set that fact against the 29 dead children from Sandy Hook - dead in the space of 10, 15 minutes,
Since Sandy Hook, in the US there have been over 3,500 deaths through firearms - as a US citizen, are you really prepared to accept this as the price for "keeping your family safe"?
http://www.slate.com/articles/news_and_politics/crime/2012/12/gun_death_tally_every_american_gun_death_since_newtown_sandy_hook_shooting.html
Now, onto comparisons between the US and the UK.
First, Clanad you talk about an ongoing case of a homeowner in England using a shotgun to defend themselves and are being prosecuted, and you profess amazement. But the only recent incident of that nature happened at the back end of last year to a couple at their farmhouse where they shot at their intruders
http://www.bbc.co.uk/news/uk-19886504
Is this the case to which you refer? It would be helpful to provide a link if this is not it. They were questioned and formally arrested, since a gun had been discharged and there had been several casualties. The case might even come to court - I am not expert enough to figure that one out - but they will not be prosecuted, and they will not be found guilty. So trying to use this case as a defence against keeping guns in the US is a non sequitur, since we are talking about a shotgun anyway.
As far as the comparison in violent crimes is concerned, if we were to believe the figures as supplied in your John Arnott post from the DM, then yes, Britain appears to be a haven for viulent crime, especially in comparison with the US. Problem is, he either deliberately or in error completely misrepresents the facts by comparing data from different data sets. Take a comparison with the US. Those US figures are derived from the FBI crime stats, who classify violent crimes which only include aggravated assaults and forcible rapes. The figures provided for the UK come from a dataset which also includes simple assault,and all crimes against the person. As it currently stands, it is impossible to do a direct like for like comparison with the US. When you strip out the non-violent crimes, Britain still has a higher violent crime index per capita, but not that much different from the US.
And to get this, the US have not only a much much higher death rate from guns, but a much higher homicide rate in general - 4 times greater than in the UK. Thats a big downside to a culture of gun ownership.
Around 300 million guns in the US. Population roughly the same. But only 47% of households have a gun. Wilderness areas I can understand the need for a gun in the house, maybe a gun for hunting. Thats it.