A dozen people die in a senseless act of violence, and your have no idea what caused this.
This could have been prevented if this individual's parents took greater interest in their son's life, if this individual's friends and classmates were actually good friends and followed up with him following the life altering event of leaving school, if this individual's neighbors were actually...you know neighborly, and took interest in the happenings/safety/and the people in their community. Guns aren't killing people in this country. People no longer have compassion, no sense of loyalty, and most importantly, no sense of responsibility as a parent...as a friend, as a neighbor. The lack of personal decency and real relationships are what's really behind this...what's really killing us.
Instead you take the sophomoric view that guns are responsible for this. It's easy to make devastating bombs and chemical weapons out of household goods. What are we going to do about household goods? And whether you chose to accept this or not, the fact is gun ownership is the very final/last bit of real liberty man has in society. An individual may be robbed at home, mugged on the street at knifepoint/gunpoint, targeted by a vehicle, victim of a kidnapping, may be a victim of a terrorist bombing, may be the target of a terrorist hijacking, may have to defend his property from intruders from outside the country who bring their own weapons...you name it gun laws be dammed. And I guarantee you that during those critical seconds when your life is in the balance, the police/the Government will not be there to protect you...they are not our personal bodyguards and can't be with everyone everywhere all the time. Man has a right to defend himself in those seconds, with deadly force if necessary, from whatever threats exists to himself. You take that away, then we have no rights any longer.
While I enjoy sport and target shooting for cathartic reasons and respect them as historical relics of heroes who fought for our freedom in the Pacific and Europe, I will say I would certainly welcome the day the gun industry goes out of business...but as a victim of their own success, not as a victim of sophomore reasoning.