People consistently ignore the argument that changes all research done that is either pro or against guns.
If guns were never legal in the US, and no one had guns, all those graphs would be the same, and all the arguments would be the same, except people would be asking for bans on whatever the most common weapon used was if guns weren't available. If guns weren't available and gangs were running around with bows, everyone would be asking for them to be banned, if they were both banned and gangs were running around with axes, or baseball bats, etc, etc.
If this guy couldn't get hold of a gun, he could have driven a car full of extra petrol in cans into the school and set fire to the whole place, he may have killed several times as many people as he did.
Most murders would still be committed, gang culture in the states is responsible for a huge majority of murders in cities... do gangs exist because guns exist? No, would gang members still kill each other without guns, yes, would most murders happen anyway, yes.
Like I said, people like to talk about guns and violence because it makes us feel more comfortable thinking in a country with widespread gun control that it isn't as violent here and that we're "safe", because everyone wants to feel safe.
Almost all the arguments are illogical and stupid, with a huge portion of arguments resting on guns being easier to kill people with than other weapons, which is both horse**** and not even logical.
Ultimately when you CHOOSE to kill someone, that is the difficult part, the choice, not the trigger or the knife, or the fire, or the car, or the bat, or poison.
Fire and poison are ridiculously easy ways to kill en masse, and with more chance of getting away, both are also WIDELY available around the globe and need no training to implement at all. As much as people think Call of Duty makes you a great aim in real life, running targets, reloading, theres a reason why in most shootings most shots miss.
Is it really easier to go into a school and shoot everyone, than to get a job in the local supermarket and put poison into all the milk cartons, or set fire to a building, run people over, really?
The world is FULL of crappy people willing to do crappy things for whatever reason, guns don't make those people crappy, or make it easier to kill large numbers of people. The sobering, horrible reality is just about anyone you've ever met is fully capable of killing hundreds of people pretty easily if they really wanted to, very few people choose to do so, because while so many people are pretty crappy some of the time, most people aren't THAT crap.
Tragedies, mass murders are just something that happen, always have, always will, no matter what measures we think will prevent them, they won't.