Guns are not exactly good at healing, making or creating.
A better comparison would be knives. Knives can be used for stabbing and killing but also for sustenance (cooking), for healing (surgery), for arts (sculpture). So perhaps this is akin to National Cutlery Association (not sure if such an entity exists but you get the idea).
There is actually very little evidence for this. Violent crime is not strongly correlated with gun ownership (and it may even be negatively correlated). Instead, it appears to be based strongly on factors like poverty.
Here's a good summary. http://politics.stackexchange.com/questions/613/gun-prevalen...
Hunters are a different case, but their weapons are rather different too. To be honest I wouldn't that much care about depriving them of a pastime if it meant turning US gun death figures into European ones. But that's probably unnecessary.
Not at all the case. Guns allow for the physically weak to still have a chance to defend themselves. On NPR I remember calling for the police to help as her ex was breaking into the home. They didn't have anyone anywhere near by and the woman had no weapons on her. The boyfriend ended up breaking in and attacking her quite badly. He didn't need a weapon and a weapon wouldn't have made what he did any worse, but it might have given her the chance for the victim to defend herself or scare him off.