We can make it more difficult for a schizophrenic nut hellbent on slaughtering innocent people to do so and in great numbers. Sure, some unhinged, dangerous person can grab an axe and hack a number of people to death before he's killed, restrained and arrested or takes his own life, but what are the chances that a guy wielding an axe can cut down 26 human beings in a matter of just a couple of minutes? Even the strongest, brawniest and fastest Oregon lumberjacks in the best of shape can't hack 26 people to death in just a couple of minutes.
Of course a nut will use anything at his disposal. But why not take legal, constitutionally permissible steps to make it a lot harder for him to use the deadliest and fastest weapon that can wound or kill the largest amount of people in the shortest amount of time? 26 Americans don't die in a matter of just a few brief minutes because of sharpened pencils, baseball bats or an axe.