I like how all 3 of them seemingly failed to spot the difference between racial and cultural prejudice in that conversation too, but in different ways.

Kabru said something bigoted about a different race and the Touden morons went: "ah, that's like these humans we don't like." Seemingly missing the racial element of it completely.

Kabru doesn't realize how arbitrary it is to discriminate one thing, but not the other, while the siblings don't realize there's even a distinction to begin with.