Considering how the entire world united under Naruto then yep.
No, only an army fought behind Naruto for a single battle, and they came to respect him during that battle.
Naruto doesn't have control over the Shinobi Alliance.
Last I checked, the US is a democracy. And when we saw Al Quada has the ability to harm us at 9/11, what did we do to them?
What do you think the chances are the Kages will listen to Sasuke, who they view as a terrorist?
So a guy who is going to kill someone who fought along side him and saved his life a couple of times, is going to establish a democracy?
A person who was willing to destroy an entire village down to the last child is going to establish a democracy?
A person who is going to kill five people in their sleep is going to establish a democracy?
Al Quida was a terrorist organization, that killed may people, they couldn't be reasoned with at all.
And they aren't part of the US, that is war, or should the US just let others kill their people?
Sasuke is going to kill the five kage, and implement his new world order and he doesn't care if the world wants it or not, that isn't democracy.
Also the US had the backing of its people when it went to war, that is democracy.
Who is backing Sasuke, who supports his plan other than him?