> Choosing to buy a gun should be thought of as one of the stupidest decisions the average person can make.
Yeah, we're not at that point. We aren't remotely close. Recently polling shows the country split almost 50/50 on support for stricter gun laws [0]. If we ever do reach the point where popular sentiment reflects your quote then you've _already_ won, and changing laws to ban guns isn't much more than an afterthought.
If somehow you managed to push through a gun ban before the country has changed, you're going to see a revolt. What do you do when police departments refuse to enforce the law? Probably entire state governments as well? Are you going to send in the army to go door to door confiscating guns? Assuming that the soldiers are willing to follow orders...
Barring a major flip in US culture - which doesn't appear to be remotely likely in the near future - the only possible outcome of a ban on guns is civil war. That isn't dramatic right wing propaganda. The right to bear arms is enshrined in the US constitution and upheld by the Supreme Court. You may not like the fact that it is, and you may not think that it should be _but it is_. If we reach the point where constitutional rights are meaningless then the entire US system of government has failed, and its demise won't be a pretty thing. I hope you're smart enough to realize that a US civil war in the modern era would be incredibly bad for everyone and would probably result in the deaths of millions.
0: https://news.gallup.com/poll/357317/stricter-gun-laws-less-p...