We're special for a lot of reasons, including 'soft power' (e.g., the most watched movies in the world are from America), 'hard power' (our military is more powerful and more likely to be used than any other plausible combination of nations I can think of), and economic power (our GDP is on par with the entire European Union. It is significantly larger than Brazil, Russia, India, and China's combined).
For these reasons, most every educated person in the world knows more about America than almost any other country (excluding their own and a handful of neighbors). I don't understand why a citizen of country X is surprised that most Americans don't know much more about X, than they they themselves do about Country Y (where Y is roughly of equal importance as X, but is on the other side of the world).
I've met Brits who were insulted that I only know who their Prime Minister is and what the major parties are, while they are familiar with the intricacies of American politics (upcoming elections, controversies, major players in each party, etc). Yet, they almost always know absolutely nothing about Brazilian politics (while I also know Brazil's major parties and President). Why is it so difficult to understand that, to an American, British politics are about as important as Brazilian politics are to a Brit?