Where does the State Defense Force (State Guard) fit in? About half the states have one.
The State Defense Force aka State Guard aka State Militia, which you insist are the only ones enjoying the 2nd Amendment, fit in part (2) because they are not part of the National Guard or other enumerated groups.
Interestingly, it is precisely this part (2) which you firmly allege are not part of “the militia” enjoying the protections of the 2nd Amendment.
Ergo, the only group which you contend enjoy the 2nd Amendment are ipso facto a subset of a group which does not enjoy the 2nd Amendment.
You lose by your own argument.
Those would be organized state militia. It still doesn't preclude the unorganized militia that still exists in EVERY state for defense of state or country. Incidentally the 2nd makes no reference to just organized and addresses both classes defined as militia. The definitions haven't been changed and still apply.