So more gun laws would've prevented Timothy McVeigh? Muhammad Atta or any of the alleged 9/11 conspirators?
I think he was pertaining to strictly firearms. Sure, potential bombings and such will still be a threat, but stricter gun laws can diminish the possibility of such heinous acts. The kid apparently took the firearms from his mother, when to his school and shot up innocent kids. The possibility of that happening could have been significantly less by tightening up the gun laws.
Although "Amurrca" has a right for it's citizens to bear arms, but there has to be a strict requirement in order to do so. As far as I know, I can't think of any mass murders in Canada from troubled, mentally ill kids shooting up schools or theaters. A huge part of that is the gun laws in our country. I know some people say it won't totally work, but no law really does. It does what it can. Criminals will get access to guns regardless, but this isn't the case here.
Too many times, it's not big time criminals or gangsters that commit these serious acts. They are criminals after the fact. Columbine, The Dark Knight shooter, Virginia Tech and NewTown all involve troubled and mentally unstable individuals who pack the heat that are taken from people who are simply allowed to keep guns in the house. Eliminating such easy access to firearms might create a stronger barrier from these kinds of people wanting a gun to off a bunch of students and then themselves. With stricter gun laws, depending on the individual and the lack of effort and planning that most of these kids go through to commit a mass murder (steal a gun, buy from some shmo who shouldn't have one in the first place, show up with a gun, shoot people and then themselves immediately after), I highly doubt they would actually go through a screening process, interviews (spouse, family, yourself), licensing to carry a non-restricted fire arm (18" barrel or longer) and another process to get licensing to get a pistol (even more stringent), training and exams, and THEN go to a school and shoot people up.
There shouldn't be a ban on firearms, but it should take more than iD and a background check to purchase a firearm.