I understood well enough. You're assuming that those White/Black people were Japanese because they were born and raised Japanese. From a certain perspective,

I understood well enough. You're assuming that those White/Black people were Japanese because they were born and raised Japanese. From a certain perspective, that would not be correct. Many people (most of the world) view race as fundamentally intertwined with ethnicity, ergo, the white folks in the video may never really be considered 'fully Japanese', although surely they are mostly accommodated as such. 'American' really isn't an ethnicity so 'new world' people often have difficulty grasping how others might view ethnicity. As longs as people are treated reasonably, frankly, I don't care.