My only real issue is this
And as the United States has grown and changed, so has the definition and sanctioning of militias.
As I am aware there has been zero amendment to that constitutional right. So no the definition has not changed, only how they are defined. Yes there is a difference. Think about it Your right to free speech, speedy trial, legal representation, etc are afforded you without question. Any constitutional right related to guns in anyway are a right you have to prove you have. Now does that make the least bit of sense. To me people are picking which parts of constitutional rights they like and agree to but anything else they whine and cry until those rights are restricted illegally I might add. Just my opinion.