What? Guns don't contribute to crime? Even a single killing with a gun is by definition a "contribution to crime" so I don't get what you're trying to prove here. I seriously can't grasp why people (like you it seems) defend America's gun policy. And statistics can prove just about anything, do you think those gun related killings would be higher if guns were outlawed? I don't.
Okay, perhaps a better word choice would be "cause" rather than "contribute". If you were somehow to disarm the entire US (technically impossible), yes, murders would drop by some degree. However, other violent crime such as rape would likely rise. Even more so, crimes like burglar would certainly rise by removing a major deterrent factor. I wasn't trying to sway you, only saying that people are blaming the wrongs things, but you had to go there
What really strikes a nerve with me is how much some people want to take away guns. How fair is it to strip the law-abiding populace of a right just because a handful of psychopaths choose to abuse it? Are we just gonna get rid of everything even slightly dangerous? We live in enough of a shelter society as it is. Heck, cars kill far, far more people than guns. But people view cars as essential, and would not dream of taking them away. Yet guns seem less important, so some people are willing to get rid of a "nuisance" for a little extra peace of mind.
Not to mention the impossible act of disarming the US populace without resorting to brutally oppressive measures. And just because there is a law forbidding gun ownership doesn't mean criminals are gonna obey that. Drugs are banned, but they don't seem to be in short supply. India has a strict gun ban law, but that sure didn't stop a small group of terrorists from killing 179 people - basically unarmed sitting ducks. So yes, lets give up any ability of defending ourselves for a false sense of security. Virtually every shooting massacre has occurred where law-abiding citizens aren't allowed to carry guns.
Then there is the economic factor. The firearms industry employs millions of people, directly or indirectly. Cutting them out of the picture would be economic disaster. The job market is terrible here and the only source of reliable income I have found is running a rifle range during the summer. So yes, lets ban guns and screw people like me out the only job we can find. People make a living manufacturing guns, selling guns, hunting and other things.
Finally, an armed populace is a check against government oppression. Many brutal dictators throughout history would not have been able to maintain power if they had not disarmed their populace first. This country would not have even existed if it weren't for armed civilians. It's a part of our heritage, and taking it away carries the chance of sparking another civil war.
What works in your nation doesn't mean it will work in ours. So it would be nice, even if you don't agree, to at least respect our rights and beliefs.