Less gun-related crimes, perhaps, but then more knife-related crimes? More bat-related crimes? Why is it the gun to be demonized and not the person themself?
What, is that a rhetorical question?
This guy shooting his girlfriend was clearly impulsive, since he later helped her to the hospital. If he did not have a gun it's not likely he could have done as much damage as he did before he started regreeting it. Guns are particularly bad when it comes to impulsive violence like that.
And stuff like that shooting in Denver this year? You can't do that with a knife or a hurley stick. Guns are better at hurting people and hurting larger groups of people in shorter time periods, and if you can't get your head around that I have no idea what to say.