So... This Happened

[kılıç_mehmet]

Well, I have to agree, though the fact that Japanese and Chinese do not intermarry(not even among eachother) is no real support for their high IQ's(which I think is disputable).
However, this does not suggest that I am for intermarriages, I do as a matter of fact, think that in today's world, intermarriages are a fine way to destroy cultures, by corrupting the identity of an offspring.
And to be honest, more genetical diversity does not equal better offspring.

But in countries like America, where people don't possess real identities beyond their skin color, sure. Let them have their mulattos in abundance, hell if I care.

japan is an isolated island nation what else could possible explain it and yeah the chinese and japanese hate each other. Japan has only recently become open to the rest of the world

Only recently? No, they were open to the rest of the world before that. How else would have they received the heavy dose of sinification that they did?
They use the sinic alphabet, zodiac, have adopted various Chinese customs, and even had their language significantly altered by Chinese. They might not have intermarried, though no people are that isolated.

But I agree with you on the subject of intermarriages. I personally believe that intermarriages do not add much to a nation's future, as they certainly promote the same behavior in the offspring.
This is how many of my people's tribes, like the Apar and Bolgar disappeared.
A person that cares about his people, will do his or her best to marry amongst his or her own.