Here's a scenario where we can define this generalized wish to do something.
I own multiple weapons, always have. I'm well and truly trained and experienced (retired Army) on how to use a weapon and when and I can hit what I aim at. I have a concealed carry permit which I choose to exercise sometimes, sometimes not. I'm prepared to use a personal weapon in defense of life and limb (yours too) but have not had to ever even display a weapon in civilian life, much less shoot someone. My weapons are "secure" from casual pilfering or unauthorized use.
So, what do you want me to do that is different and how will that action keep a horrible incident like this one from happening? Just curious as how this generalized wish to do something will impact me and to what end. What exactly would you gun law, gun control advocates want done that is different?