He was saying that rule #3 says that you use a comma to separate an introductory phrase that has been moved in front of the main clause.
That doesn't change the fact that it is "introducing" that reason for the main clause. They are still tied together
The fact the 2nd amendment mentions the advantage of having a militia that is well practiced with firearms, in no way implies that is the ONLY reason why the federal government is prohibited from any firearm jurisdiction by the constitution.
It mentions no OTHER reason though does it...apparently that reason was important enough to get mention in that very simple statement. No others were as important to that Amendment
Lets assume you are right that there was only and only one reason why the federal government was barred from any weapons jurisdiction.
Look again at exactly what that reason is, and who it is defending?
{...
A well regulated militia being necessary to the security of a free state, the right of the people to keep and bear arms shall not be infringed.
...}
First of all, the word militia is not capitalized, so it is not the official state Militia. It is the people in general, the adult males of sound mind and body. And their goal is not just to defend country, but state, municipality, home, etc.
And it is not the National Guard or the Militia the President can call up, because it is referring to the needs of a "free state", not a free country. Then finally, look who it says has the inherent RIGHT to keep and bear arms? It is not the federal, state, or municipal government, but "the people". The people is MORE than just a government run defense organization.
And you don't even need a 2nd Amendment to know that. The 4th, 5th, and 14th amendments already should be sufficient to guarantee that all individuals must have a right to bear arms, or else how could anyone defend life, liberty, or property?
And by the way, the words "well regulated militia" does not refer to one that is heavily government restricted or controlled. The meaning of the word then and now, means smoothly functioning on a timely basis. When a person refers to their digestion being "regular", they don't mean restricted, but the opposite, meaning it is functioning in a timely manner, without any restrictions or constipation. We refer to "regulator clocks" because they are timely and reliable. What the founders meant is that if the general population were ever disarmed, then you would not have a population familiar and practiced with firearms to quickly draw from.
And that is still true. Countries with a population familiar with firearms always does better than one that does not.
And again, this can not refer to the needs of just a federal Militia, because why would anyone need to add an amendment as a restriction against the federal government, about not disarming the federal government's own Militia? That would make no sense. Not only is there never any chance the federal government would disarm its own Militia, but none of the Amendments in the Bill of Rights were for people who wanted a stronger federal power. The whole point of the Bill of Rights was to guarantee restrictions on the federal government, so that states would be willing to sign on to the new federation, after these assurances of restrictions.
