LOL...those are some funny ones.
It's also amusing that all those who posted "Stupid American This" and "Stupid American That" clips, smug and secure in their ivory towers of higher intellect, seem to have forgotten the meaning of the word "stupid."

I sense a rather nasty tone in the presentation, also, which surprises me coming from Australians, who have always seemed to me to be quick to poke fun, on the average, but also willing to be good-natured and sympathetic about it. And Australians ought to know better than to think America "runs the world"... that, too, surprised me.
This particular clip displays American
ignorance in all it's jaw-dropping splendor, not actual stupidity... although the two often go hand in hand.
I can't defend these people, but I will say they are not representative of the majority (although it is true that the average American is becoming less and less "well-rounded" in their knowledge of science, math, geography, history, and foreign affairs and culture; often to bizarre extremes). There are even many Americans who don't have much "book learnin'', yet have extensive practical knowledge and excellent problem-solving skills.
I suppose knowing to keep your fool mouth shut when you're fairly certain you don't know what the hell you're talking about is a sign of intelligence, so it's possible these Americans are stupid to some extent... I'll concede that.

I also must point out that it wouldn't take long to find a few ignoramuses in any crowded place in Australia, the UK, Europe, or anywhere else... America has a lot of ignorance, but we didn't invent it, and we don't have a monopoly on it.