Is your point that it can be worse elsewhere? Fine, I'll agree.
Your most recent, the Oslo killings. That was really bad. But are you comparing America's shooting rates to that one incident in Oslo?
http://en.wikipedia.org/wiki/List_of_countries_by_intentional_homicide_rate
Take a look at that. Oddly America isn't that bad in comparison.
Greenland is worse. Are people aiming at polar bears and accidentally shooting fat people in white snowsuits?

But if America was so safe, why does everyone feel they need a gun to protect themselves?