I don't think anyone can guarantee that this, or, more importantly, any future U.S. government will never turn on it's people. And for that alone we should not be the generation that allows for the disarming of it's people.
Sure, and similarly you can't guarantee that you won't be struck by lightning two hundred times, eaten by a giant white whale, abducted by aliens, or be the discoverer of the magic pill that will cure all known ills..However, all have something in common. Likelihood. If such a scenario were to take place, quite what anyone with a rifle would expect to do against tanks, A10's, RPG's, and chemical ordinance is worth a thread on it's own! Incidentally, I believe it's illegal (so far) for civilans to hold armed tanks, A10's, chemical weapons and RPG's.
Interesting the statue shows a musket...Maybe that's a clue in interpretation of 'bear arms'.
The vast majority of Afghans want to be left in peace. They don't want the Taliban, the Pakistani's, the Americans , the British troops, or the other NATO contingents. So when he says they love the Americans, he's wrong, they just don't hate them; they simply dislike invaders in general, but don't hate Americans in particular.