Defensive uses of a gun
Your estimate is based entirely on justifiable homicides, which are such a tiny percentage of gun uses. The estimates of gun uses for self-defense range from a low of 200,000 per year (John Lott, iirc) to a high of 2.5 million (Gary Kleck, et. al.). Speaking as an avid gun enthusiast, possessor of a concealed carry permit, and an assortment of guns (and proud of it), my guns have never once been fired at anyone, but have twice protected me from crime of which I am aware.
The mere presence of a gun protects you from crime in an unreportable way. For instance, one story I have heard first hand, a woman was accosted in a parking lot, lifted her blouse to show the grip of her gun sticking out of her pants, and was left alone. Given the random behavior of cops when presented with a carrying civilian, even when licensed, and the amount of sheer annoyance involved, these happenstances go completely unreported. For every single time someone shoots a criminal, there are literally hundreds of times when the criminal was deterred by the mere presence of a gun.
I think that the one post who said, essentially, that data, logic and personal experience would never be sufficient to change his mind on gun control pretty much nails the attitude of nearly every gun-grabber out there. Statistics exist. Much research has been done. Gary Kleck and John Lott are the primary ones of which I am aware. Mostly, the other side resorts to making statistics up, resorting to fear, and smearing the image of a gun owner.
Think I'm kidding? At one point, one of the anti-gun groups was counting as 'children' ages up to 21 in a study, leading to almost all gang violence being included in their 'kids killed by guns' statistic. Naturally, gun control would have no effect on gang violence, because, if you can't stop the drugs they sell, you can't stop the guns they use either, as both are freely made in South America. Also, the current chimera that 'you are far more likely to be shot by your own gun than to use it defending your life' fails on two counts, one that you mentioned, that suicides count in this category, and two that they woefully underestimate defensive uses of handguns. Note that they don't say 'you are far more likely to shoot yourself in suicide', as, if you remove suicide, getting shot by your own gun becomes statistically insignificant, and less than actual, reported justifiable homicides. I have, frankly, grown very weary of defending my lifestyle to mendacious people such as these.
As to whether or not citizens can stand up to federal or state officers, I don't know if it is possible at this time. It has been done successfully before. I will say this, that if government breaks down into chaos, we the armed will be able to defend ourselves from others. And, please don't insult me by saying it will never happen, as it has happened, many times, most recently in Ferguson. If the government degenerates into armed thugs, then the armed citizen stands a chance. Besides, the whole thing is, to me, a question of authority. In your country, authority flows from the monarch. In ours, it flows from the people. It makes sense that you would allow to be armed those who are in authority. Also, if armed, I have a chance against tyranny, no matter how small. If unarmed, I stand no chance. I can improve my chances by taking training myself.
To quote Thomas Jefferson: "The tree of liberty must be refreshed from time to time with the blood of patriots and tyrants."