How well did you speak the local languages? How close were your friendships?
Speaking of the Chinese, Korean, and Japanese - the only groups I have first hand knowledge of, I’d say the OP was right on target. Perhaps, WRT other groups, he painted with too broad a brush; I don’t know.
That said, they can be very polite to visitors, no matter their race. As long as the visitor doesn’t speak the local language they’ll never know....
The Lefts beating the drums of racial prejudice in the US has helped feed this attitude in other countries. They love to feed on the “we hate each other” stuff in the media.
At the same time, every culture has it’s own biases against particular groups.