That's a pretty fine post BPK. We're never going to rid the world of the forces of evil no matter how hard we try. Airplanes, cars, bombs, box cutters, knives, pistols, shotguns, rifles, assault rifles, gas, gasoline, diesel fuel, arson, pipes, axes, shovels, water, ropes, pillow cases, excessive debts, bad relationships, jealousy, love, power, money, greed, sex, rape, hatred and mental instability, or chance of being ID'd committing a crime all have led to murder and in many cases mass murder. The assault rifle has led to fewer of these violent deaths than any weapon or emotion listed above, except in war.
Do any of us really think taking one of the alternatives away will matter when they have so many other choices? Evil will always find a way to commit murder, history has proven that and no matter how vigilant we are, it's going to happen. BPK hit the nail on the head, it's unfixable, the best we can do is to contain it by educating our children and society and hope that the set of values we build in will prevail.