In my experience abroad, Americans have a decent handle on it, at least compared to Europeans. I've met more than one Irish person who, for example, did not know that the Six Day War ever happened.
Thanks boo. You know so much about my life and know precisely what I have and have not done. Does acting like this make you feel better? It should make you feel shame, but you may not be capable of that.
You're the one who, for ego or fake Internet points or whatever, just throws around trite stereotypes without any experience or data. Just lazy shit like, "hurp, derp, Americans dumb." It doesn't make you a bad person, it just means you're lazy and ignorant. That's fine though. You can be lazy and ignorant.