There is one BIG digit in the calculation in America that will destroy that attempt though. Show me how this worked out for all the nations where the people were Armed in those countries? The US is filled with slimeballs at the helm...but NO ONE wants to come to start a fight on our soil...can't fight our military to their face with the people also shooting you in the back so...that is why it doesn't/won't happen here...sorry. The quickest route to open battel confrontations success is to start focusing attacks from two or more sides simultaneously. VERY difficult to fight on more than one front at a time! The weaponry matters not, that strategy is historically very successful.
Imagine the Taliban walking into a city...shots will be coming from out of every house in the hood! They would likely never make it the first day...the response would be overwhelming. I have NO doubt we would destroy them, the people of the US would not tolerate them at all. Seriously...ask around!