I don't support the NRA, and I'm not a member.
If a madman kills somebody with a hammer, is it the fault of the hammer manufacturer? What about the law abiding construction workers who use hammers in their day to day work? The average person who just happens to own a hammer for repairs around the house?
The correct answer is none of these people have the blame except for the absolute psychopath who killed someone with a hammer. I am not a murderer, and I've never hurt anyone with a gun, and would never hurt anyone with a gun who didn't attempt to harm myself or my family. I am no more responsible for the actions of absolute psychopaths than the hammer wielders in my analogy. Which, by the way, more people are murdered with hammers and clubs than with rifles, which people like you seem so intent on banning. https://www2.fbi.gov/ucr/cius2009/offenses/expanded_information/data/shrtable_08.html
Handguns are, of course, another story, but they're concentrated in heavily regulated areas like Chicago, which have very strict gun laws. Despite this crackdown, they're riddled with gun crime, and law abiding citizens are left unable to defend themselves efficiently. Which is why gun control is a fundamentally evil policy.
But this isn't chest thumping. Laws like this have been enacted in America before. Policemen refuse to comply with them. The citizens dare the law to come in and take them, and the law backs down, because doing otherwise would mean open battle with law abiding citizens. The citizens get together with their guns and force a repealing of these laws at gunpoint, because again, we are willing to kill for our liberty. We fought an entire war over it, and will do so again if necessary.
At the end of the day what you're proposing is use of force. People like me aren't going to give up our guns just because you say so, or some politician with some unjust and unconstitutional law says so. You're going to have to take them, and to do that you're going to have to use guns, because we're going to be meeting you with comparable force. So in reality here you're not against guns, you're against private citizens having guns. You're perfectly fine with those guns being used on private citizens you don't like who are now left helpless against not only the police (notoriously racist, sexist, and authority abusers that they are), but against common criminals as well.
So you can keep masturbating to your dictatorial fantasy, or you can get real with the rest of the world. There are more guns in America than people, and plenty of people know how to make more with stuff you can buy at Lowe's or Home Depot. This is a completely unwinnable fight, and what's more yours is a completely immoral position in the long term, despite how good it makes your insides feel for right now as you morally crusade and call for people to be killed because they own a thing you know fuck all about and are pants-shittingly terrified of.
Because literally nothing you propose can or will be done non-violently, not in America. You're going to have to get men with guns to take away the guns from citizens with guns. And that blood will absolutely be on the hands of you, and people like you, because you just couldn't mind your own god damned business.
But don't let me, or facts, or observable reality get in the way of your psychotic need to have another Civil War in this country. I'm sure the side that thinks guns are icky and scary will come out on top of that.