I've never been to Japan, so I wouldn't know first-hand, but I would have thought that the ranking would have been more like this:
#1. USA
#2. Korea
#3. no clue
I'm surprised to see Nigeria above America, though I suppose that can be construed as a good thing for us Yanks; and I'm really surprised to see Filipinos on the list. I would have thought the racial tension I always hear about between Japanese and Koreans would have had more weight in the end.
I wouldn't disagree with your assessment of America's international policy of behaving like the self-appointed "Morality & Cultural Etiquette Police."