Postcolonialism of Colonialist, and Lawrence Buell

Buell often tries to examine the postcolonial stance of the United States, the country almost always has been existing as a colonist; what would be an implication through this kind of attempts? To put oneself in a politically victimized stance is one of the most convenient positions in our postmodern days; it would be interesting to analyze the coexistence of postcolonial and colonial stance in a country, the United States as well as Korea.