Because the entire song is an insult towards the US. Just listen to the lyrics. They go "Fuck yeah!" about things in turn, but the moment stuff like "Sportsmanship" and "Books" pop up, no one says a word.Ruffythepirate said:"America, fuck yeah" from Team America. Seriously USA, why have you not yet adopted that song as your national anthem?
It's a jab at the country, not praise.