Earlier quoted context omitted.
Regulating guns ("outlawing" is a straw man) ameliorates the problem of how much damage a mentally disturbed person can do. A knife in the same situation is much less dangerous, as evidenced by the incident in China at the same time where people were hurt, but none so far killed. Degrees matter.
> Regulating guns ... ameliorates the problem of how much damage a mentally disturbed person can do. No, it makes it much worse. We want the violent lunatics to have guns, because guns are not particularly fast or efficient at killing people. A lone gunman can kill at most a few hundred people before he is stopped. You know those nightclub fires that kill hundreds of people in ten minutes? We want our nutjobs to have…
Another thing here is that gun regulation alone is not sufficient. In the Netherlands guns are heavily regulated, but we still had the incident in Alphen a/d Rijn [1] last year. The shooter was a member of a shooting association and was known to have mental problems. That's just not a good combination.
If guns could be regulated in such a way that they never end up in the hands of violent lunatics that would probably be okay, but I just don't see how you could do that without banning them altogether.
[1] http://en.wikipedia.org/wiki/Alphen_aan_den_Rijn_shopping_ma...