The general assumption made by John Green, shows that he was mocking the American Dream. More specifically, Green suggests that the boy came all the way from Korea to America, just to have an American Dream of having cheerleader sex.
He writes, "my parents has sacrificed so much for this dream!" In this passage, Green seems to be suggesting that the American Dream can be anything as you work hard. This assertions is supported by Green's use of satire. For example, he was joking about the American Dream, showing that the parents has sacrificed for the boys life for this.
By using satire, he is able to mock the American Dream, and even prove it it litteraly that it can be anything for anyone.
