You do realize that the people speaking and calling them “barbarians” are from a hostile nation right? Furthermore, there’s been bigotry on both sides and it’s already been explained. They aren’t going to just magically stop denigrating the other side just because the war is over. It’s far more realistic for them to be bigoted AF like they currently are. Especially, since this “cease fire” is just a ploy to buy more time so they can attack again.

Also I find it hilariously ironic that you say something as racist as ‘I understand that the author is Korean’ and then complain about the racism in the story. The ethnicity of the author is completely irrelevant to the amount of racism in a story. It’s not about “is there racism?” it’s a matter of “does the racism make sense in the context of the story?” and yes it does.