There is no mention in the Second Amendment about an individual right to own and bear arms. The purpose of the Second Amendment was to placate those former colonies (and soon to be States), who feared the potential of a federal government acting like the King they just overthrew. The bulk of the military that fought the Revolutionary War was state militias (the modern equivalent of which is the National Guard) acting under the command of federal forces.
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While he may have read the Constitution and Bill of Rights (or just skimmed over it) it's obvious he never actually studied it, nor has he read any of the writings by our Founding Fathers supporting their ideals.
Dude needs to take some time and study the Federalist and Anti-Federalist Papers to start, then work his way through the rest of their writings.
