"Insanity" & The Second Amendment

There have been many words written and spoken as to "mentally ill" or insane persons obtaining fire arms and murdering/ maiming others. It appears that some closer attention must be paid to such mental defects as deal with guns. The following are offered as examples of such irrational thinking.

1. Maintaining that, in the USA, privately held and modern firearms can be eliminated as neither criminals nor those fearing political-tyrants and other criminals will give up their guns;
2.  The pool of such weapons is so great, especially in "gun friendly" States, that only the use of military level force and draconian punishments (Inflicted by courts martial or secrete courts?) would even begin to limit privately held arms (Here I note President Obama's military level arming of civilian agencies, whose personnel is loyal to him while the military is still, basically, loyal to the Constitution).
3. Ignoring the fact that such, privately held, guns prevent many times the number of murders/maimings than those caused by criminal use of firearms.
4. Ignoring the fact that those there are very many nations above the USA with higher murder rates as have much more restrictive gun laws than does our Republic.
5. Ignoring the fact that the criminal misuse of guns is, in the USA, largely a matter of Black thugs (Killing other Blacks, both probably with criminal records and involved in the sale of illegal drugs).

As SCOTUS has declared the Second Amendment as providing an individual right (Like voting) for adult citizens (And has extended that ruling to the States), any such right may be constitutionally removed only after a judicial finding (With full "due process", including a verdict by a jury if  individual citizens demands such) of such criminality or serious-and-dangerous mental disease/defect as would allow the limit to the right to "keep and bear arms" as well voting, holding public office, disposition of property, Etc..

In the last days of the Soviet Union opposition to the government was declared a form of insanity"and confinement (With abuses) in prison-line "hospitals" inflicted.