I have a friend that does the same, I usually post stuff about the Civil war and how the Confederates also were trying to overthrow a tyranny. The gun people today have more in common with the confederacy than with the revolutionaries. IMO The Bill or rights were there to protect the people from the government much more than to protect the people from say the British. The colonies/States did not very much trust the central government; they hated the idea of Hamilton leading a federal army. So the Militias could also technically be used to defend the States vs. the Central government if it was necessary. Obviously that still means the militia needed to be regulated but it can be argued it should be the States doing the regulating, but that gets us into the state rights argument and I guess the federal government could use the commerce clause to enforce regulations.