What Illusion argued is bieng admitted by almost all, as far i know, historians even in South Korea, even though only few are willing to talk about it in an overt manner. Ethnicity has been a very useful method of legitimization both in North and South Korea, in that it is so easy to relate it with their own way of arguing authenticity. As far as kids on KIDS are concerned, at least in South Korea, this strategy seems to have been successful so far. To them, state, ethnicity, and ancestor are identical concept that we should follow whatever it takes. Interstingly enough, anti-communism in South Korea is closely related with ethnicism and nationalism, while so is anti-American imperialism with them in North Korea. Who makes up ethnicism? The answer is simple. The Power does. Academically speaking, power invents ideology, tradition, and justice, just in order to mask contemporaneous contradictions. Don't mad at Illusion. Though it's hard to take, he is not absolutely wrong.