I've been hearing that the War for Independence wasn't a war against a foreign foe, but was a civil war. Toss in how much it messed up the country whether the foe was domestic or foreign. Part of my fascination for this is that the scholars who address this issue point out that Tory meant conservative, as it still does.
Even more interesting to me is that there were many more loyalists out there than most people realise. Particularly in the southern states. I've seen comments where people from the south will say there were battles fought without a British presence during the War for Independence. I would also add the coercive nature of the rebels, particularly in New England.
Toss in that the militia needed to be under some form of civilian control, which is really what the "well-regulated" means. Even if you want to use the "well trained" meaning, there needs to be some form of structure because fighting a war requires a lot more than just being a good shot. There has to be discipline and serious drill, which comes from, well, organised training. Or as the Supreme Court said in Presser, which pretty much dealt with the militia:
The right voluntarily to associate together as a military company or organization or to drill or parade with arms, without, and independent of, an act of Congress or law of the State authorizing the same, is not an attribute of national citizenship. Military organization and military drill and parade under arms are subjects especially under the control of the government of every country. They cannot be claimed as a right independent of law. Under our political system they are subject to the regulation and control of the State and Federal governments, acting in due regard to their respective prerogatives and powers. The Constitution and laws of the United States will be searched in vain for any support to the view that these rights are privileges and immunities of citizens of the United States independent of some specific legislation on the subject.The issue was the common defence and how it would be structured. not personal weaponry.
Unless you can show me those exact words in the constitution, then you're wrong and I am right because it does make it clear if you go a little beyond "we the people" that the document addresses the common defence.