People like you are the reason these shootings are so localized to the United States. You think MORE guns would help? There's really no sense arguing Gun Control with Americans, they're just so off from the rest of the world and can't see things like regular people.
No one should have the right to own a gun. It should not be easy to own a gun. There is no need for anyone other than the police or military to own anything better than a hunting rifle or shotgun. Having assault rifles for "self defense" is asinine and until America sees that this kind of stuff is going to just keep happening, so grab some popcorn and have a seat.