Already had a thread on this. If guns werent so easily available, then the man might not have been armed in the first place.
Gun homicides are 57 times higher in the US.
13,286 deaths by fireamrs in the US, so one incident of someone else having a gun isnt going to be significnat in the scheme of things.
Their choice if they wnat them and they end up shooting each other, but am happier with the UK position as its safer. I dont have the need to own several weapons.