That's not my primary argument. My primary argument is that the federal government was never given any power to even compose a thought about the personal arms of the private citizen.
That fact disallows any grading of "reasons" for securing the right to arms; you have no justification for assigning any degrees of importance for the
many reasons why the right to arms is excepted out of the powers granted to government. Put simply, government has no legitimate reason to qualify reasons.
I would point to the principle of conferred powers and retained rights. The interests "We the People" have
conferred (granted) to government (warmaking powers, maintaining an army) we can no longer claim any power / right to (to your quesiton, we have no claimable right to possess and use the weapons of open, indiscriminate warfare).
The obverse of that principle is of course, for those interests that "We the People"
never granted government any aspect of any power over, the people retain full and complete rights to and government has no claim of authority in those interests (in this case, the right to keep and bear arms).
No doubt it would be undisciplined. It was assumed (by the framers) that the people would always have the state governments on their side and their organization and structure in a dispute with a tyrannical federal government and much ink was used explaining that.
Interestingly, Hamilton discussed in
Federalist 28 what would happen if it was the state government that went tyrannical and the obvious deficiencies in order within the citizens fighting against that government. Of course
defending Liberty from usurpers remains the priority no matter what the obstacles (and yes, a reason why the RKBA is secured). . . .
"In a single state, if the persons intrusted with supreme power become usurpers, the different parcels, subdivisions, or districts of which it consists, having no distinct government in each, can take no regular measures for defense. The citizens must rush tumultuously to arms, without concert, without system, without resource; except in their courage and despair."
I don't expect a reasoned reply from you but a least you have been presented with the truth. I know it will make no difference to you because all you argue is that the "main reason for people to have weapons" is so they can murder.
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