If the Founding Fathers had intended citizens to be able to overthrow the government, maybe they wouldn't have made it a treasonous offense right in the Constitution.
Practically every person at the Constitutional Convention participated in the Revolutionary War either as a shooting soldier or as part of the political infrastructure. Every one of them had committed treason once in their life already. Under the Articles of Confederation, the writing of the Constitution was a treasonous act as well, which is why there was such care taken to prevent leaks and rumors. They knew that treason had to be an offense, but that it also was occasionally necessary.
Most of the Founding Fathers spoke in their own writing positively about private gun ownership, either for health reasons (Jefferson and Washington especially), or as a check against government power (the more radical Anti-Federalists).
Practically every state constitution of the time guaranteed private ownership of firearms, and there were no practical bans on the personal ownership of firearms, cannon, or any other instrument of war, excluding laws excluding ownership by blacks or concealed carry (and even these were generally ignored when "good people" did it.) As late as the late 1840s, Cassius Marcellus Clay (a famous abolitionist from Kentucky) used small cannon to defend his newspapers, and became notorious in his dementia for using these same cannon to scare off tax collectors. US v Miller technically still stands as saying that the only guns that can legally be regulated under the Second Amendment are those that do NOT have military function (a decision conveniently ignored by courts and politicians alike).
To put it in blunt terms, the concept that the Second Amendment does NOT protect private firearms ownership is a modern invention. Modern gun control laws were designed to disarm the Irish, the Italians, and the black, and were always meant to target "that kind of person". Being one of those kind of people myself (the dark kind of white that doesn't come from Scots/Germanic bloodstock), I find your racism disturbing.