Is part of the issue of guns simply that most people don't understand them and so we fear them in a way that has nothing to do with their actual danger. For example, a drove to Denver last weekend with a friend and I know he had a .38 in the car for self-defense. I casually asked him if he trained/practiced with it, which he does, because I was afraid of him needing to use it and not knowing how to handle it.
I think of the differences between a knife and a gun. A gun has more lethal power, but it has to be fired and is only dangerous aling the line of fire. A knife has shorter range and possibly less lethal power, but is always on and can cut or stab from many angles. Not saying either is less or more dangerous, they are just different. (and for that matter, a trained fighter who can kick and strike from many directions is different from a knife-weilder who will probably only attack with the knife)
I guess I'm wondering if people have an unnatural fear of guns owed mostly to unfamiliarity. A gun is a very potentially dangerous weapon, but it has weaknesses as well. Do we defend against it with an healthy respect or an unhealthy phobia or....
I guess past the principle of "don't let your body cross the barrel" I'm not sure what principles I should be looking at. Obviously, keeping the attaker from pointing at you is a good thing, but then what, do you just control the hand/wrist and strike the head to take the guy out? Do you try to take away the gun (and do you do that by wrestling the gun or by destroying the limb)?
Is gun defense/knife defense a new world of self-defense? Or is it an extension of existing principles/motions/evansions and strikes?