If i may be so bold to say, and forgive it if it offends but, mainly amongst older generations, asian peoples seem to not so much willingly and openly hate others, but in general as a social phenomena, not think about, or think less slightly of other asians.
It would be wrong to say its a universal fact of asia, many asian people are friendly towards everyone, be they natives, a westerner or another asian, but, i think there's always been that rivalry between asian nations.
Its somewhat like the old attitudes scots and english had about each other, though i see this attitude declining heavily in my short time on this earth.
I could be wrong though and no doubt, ive made myself look a bit of a noob, but, its a hypothesis anyway, europe has had its nationalistic phases (wooo two world wars....
) but i think, especially for places like china and other asian countries who's economies are on the rise and becoming increasingly industrialised, they are going through that nationalistic phase europe already had.
Anyway disregard my rant, im pretty sure im way off, but, it was just a angle to considor.