I am a European. I cannot understand why Americans want to have so many people owning guns.
The biggest massacre involving guns happened in Europe. It occurred in a country, which is having one of the toughest gun control laws (Norway) in the world. A lunatic called Anders Behring Breivik was single-handedly able to mow down a total of 77 people, and the policemen present at the scene could not do anything, as they were not armed.
Ok the biggest might have been in Europe, but the frequency and total number killed is much higher in the US than all of Europe combined.
It wasn't that the police present couldn't do anything, he had set off a bomb in the capital city to throw the police off, then he attacked the children on an island that couldn't be quickly reached.
The guy was/is a lunatic and it is dreadful that he managed to get a weapon. I would prefer that he wasn't able to get a gun, instead of giving lots of people guns to shoot each other in this kind of case (I doubt it would have made a difference as it was a Political Youth camp he attacked, probably not somewhere where people would be armed anyway)