You're conflating the Constitution created by the Federalists, which defined the latter two items, and the different document known as the Bill of Rights which

You're conflating the Constitution created by the Federalists, which defined the latter two items, and the different document known as the Bill of Rights which was the price of the Anti-Federalists to accept to that Constitution. And the very same Congress that drafted the Bill of Rights also defined the militia in law, and basically that same definition holds to this day in 10 U.S. Code § 311 https://www.law.cornell.edu/uscode/text/10/311 https://www.law.cornell.edu/uscode/text/10/311, modulo modern interpretation that holds "men" equals men and women, folding in the National Guard, etc. Note also that the Founders were hardly of a single mind on the subject, with, say, Jefferson being the most noted, "The tree of liberty must be refreshed from time to time with the blood of patriots and tyrants. It is its natural manure." (see e.g. http://wiki.monticello.org/mediawiki/index.php/The_tree_of_liberty...(Quotation) http://wiki.monticello.org/mediawiki/index.php/The_tree_of_l... ), but he had plenty of company. We've always had seriously ornery factions in the nation....