Why not ask instead, 'why don't the rest of them hate us?'

Anne Applebaum seeks out Pro-Americanism in Foreign Policy:

Even the most damning evidence, such as the BBC poll quoted above, also reveals that some percentage of the population of even the most anti–American countries in Europe and Latin America remains pro–American. Some 38 percent of the French, 27 percent of Germans, 40 percent of Chinese, and 42 percent of Brazilians remain convinced that the United States exerts a “positive influence on the world.” Who are they?

Her answer is, shall we say, nuanced, but much of it boils down to economic competition. There are those who share the ideals of liberal democracy, those who are old enough to remember America's aid to their own people, and then the 'aspirational' (a term borrowed from ad execs):

They’re getting richer—like Americans—but aren’t yet so rich as to feel directly competitive.

I don't know that I buy that kind of psychological profiling, but the real argument of the piece isn't a bad one:

Before the United States brushes away Europe as hopelessly anti–American, Americans should therefore remember that not all Europeans dislike them. Before Americans brush off the opinion of “foreigners” as unworthy of cultivation either, they should remember that whole chunks of the world have a natural affinity for them and, if they are diligent, always will.