If only it was that simple. And it's not isolated to America either.
"In 2013, knives or other cutting instruments were used to kill 1,490 victims. In contrast, rifles were the cause of death of 285 murder victims. 2009, the ratio was very similar: knives were used in five times as many murders as rifles."
http://thefederalist.com/2014/11/11/knives-kill-more-people-each-year-than-rifles-time-for-knife-control/
"On Saturday, more than 130 people in a train station in Kunming, China, were injured when about ten men and women wielding knives began stabbing others at random."
"It’s unclear exactly how many knife attacks have taken place in China over the years, but the almost regular media reports of the attacks suggest that efforts to regulate the purchase of knives or punish offenders haven’t been successful.
Most recently, targets for these knife attacks have included schools and shopping centers. Last June, knife-wielding assailants killed nine policemen and 17 civilians at a police station in Lukqun Township in Xinjiang."
http://www.smithsonianmag.com/smart-news/outside-americas-knives-are-often-weapon-choice-homicides-180949953/
It seems to me the problem is not that guns or knives or hammers are so readily available. It's that society is becoming more and more "broken". Why is that? I'm sure there are myriad reasons.
But it also seems if people could find a place where they are welcome and wanted, accepted as valued members, and find ways to vent anxieties and mutually rub off good vibes on each other instead of bad, maybe we'd see fewer solitary troubled people striking out in violence.
That's another good reason to call this place home.