Further, for every citizen to be "carrying", it is constitutional to defend against a personal attack against the carrier--but it remains UNconstitutional for any citizen to act as judge, jury, and executioner defending any other person, as this usurps the Due Process clause.
Yeah, but you don't have a problem usurping the "shall not be infringed" clause. So in your version of the constitution, if a police officer see's an assailant shooting people, then the officer can not act as "judge, jury, and executioner" by shooting the killer in the act of killing.