Asians frequently don’t look too kindly on other Asians. They frequently know their ethnic group and where they think it stands in relations to others.
Same could be still said of many Africans in Africa and even Europeans in Europe.
In the US “black” and “white” have become these anti-real-ethnic pseudo-ethnic identities.
Quite right.
Had a neighbor once from Liberia. He didn't like American blacks, either. He said they were 'lazy'........................
Not really. One guy from HK that I worked with was always ticked off when traveling when Japanese would come up to him to ask questions in Japanese. He was born at least 20 years after Nanking, and it was ingrained in him to still hate/detest Japan.
For fun, there's at least one youtube vid of (three?) Asians trying to informally ID ethnicity from head shots of Asians.