True, but the guns existing still is what creates the possibility of the problem existing. Therefor, dumb people holding the guns are not the problem, it is the fact that dumb people can get guns to be holding.
If we were to number dumb people with law-abiding people then that would be unfair. The Second Amendment gives us the right to bear weapons, in case the government becomes tyrannical.
IF we got rid of guns, crooks and outlaws with weapons would not give them away and we would be defenseless against them from say robbing our house or banks.
Well if you went to a self defense class I would say definitely. But lots of Americans do not go to it and a gun simplifies things so that the attacker might think twice before considering to rob you.
in the Constitution it says that if we cannot defend our house then it is a disgrace. If an armed robber came in to your house and you had a bigger gun then they would put there hands up. If you don't then they would shoot you