No, I must admit to having transferred my brother's highly emotional state to yours. Apologies for that.
Your reasoning, for lack of a better word, is very similar to his, and I erred.
Nonetheless, the substance of your argument is nil, considering the vast numbers of gun control laws and other laws that were broken at both Newtown and upstate New York. The reality is that gun control laws have little effect on a determined shooter.
It might FEEL good to advocate for a legislative remedy to crazy humans, but it's not too very realistic.
What gun control laws? By the standards of the rest of the western world, you have virtually no gun control.