Paragraphs about avoiding war apply everywhere. Paragraphs that do not apply to particular gun ownership apply nowhere.
Again, what Is your point / question? If it is: Does the U.S. governments have the power to control the sale and ownership of firearms?
Yes. No one has argued that that is not true.
Does the U.S. governments have unlimited power to control the sale and ownership of firearms? That is a legal, not moral, question and the answer is, No. The second amendment limits that power.
Does my luggage have a right to self-defense? No. The government may ban that luggage from containing an AR-15 just as legally it can ban that luggage from containing a Samsung Smart phone or a mentally impaired person from buying an AR-15 or you carrying an AR-15 into a courtroom. Why the obsession about the AR-15?