Are you really that ignorant of the historical massive prevalence of arms in America? And by that I include things like fighting knives and swords, or even canes in the Congress (OK, that was special case in many ways).
"Let's not pretend these are all equal - they might have been written by some senile, crazy old man who just wanted to maintain his enslaved properties 400 years ago."
Yes, it seems you are. You have some reading to do, I'd start with That Every Man Be Armed: The Evolution of a Constitutional Right by Stephen P. Halbrook. One of the Ur sources that the Supreme Court supermajority used to find this decision and enforce on New York and ultimate the 6 other modern slave states of the Union which have May or No Issue concealed carry regimes. If we want to dream, one or more of those could join the 25 states that don't or won't by the beginning of next year even require a licence to legally carry.