If we had/one day have ethics/morality, fellow citizen appreciation classes in grades 1-12, do you not think that would make a huge difference in people lashing out?
You really need to point out that murder is wrong?
Removing deadly tools from general access is not without it's merits of course. That's why you can easily buy a pickax or rent a bulldozer and not buy dynamite to clear rocks or build a pool.
But to ignore the citizens roll in this and outlaw just the guns/tools is to give free reign on their insanities.