It doesn't matter. Nor does the fact that he lost his license to practice medicine for a while matter. I am sure, though that United was pleased when all the dirt on the man was brought out....as though that justifies what happened to him on their plane.
Perhaps I can enlighten you about your ethnic background question. "all you asians/orientals look alike" is one of the most insensitive remarks that can be made to any asian person. No one wants to be at the bottom of the totem pole, and that makes minority groups some of the most racist, bigoted prejudiced people in the world. Japanese feel superior to Koreans and Chinese. Koreans hate the Japanese for what the Japanese did when they occupied Korea. To call a Korean "Japanese" would be like calling him a pig. Okinawans were considered the lowest of the low, and if a person of Japanese ancestry married an Okinawan, they were probably disowned. This stuff happened a lot in Hawaii, and it has taken over a hundred years for the prejudice to dissipate somewhat. While the pendulum has shifted and Okinawan cultural stuff is celebrated and really big in Hawaii, Okinawans living in Japan are still discriminated against. One interesting observation I have made is that FOBs (fresh off the boat) (you can see my prejudice is showing) are the ones most interested in my ethnic background. They are the ONLY ones who ask me "where are you from?" When I respond "from Southern California" they get confused and ask "No, where are you really from?" Getting national origin wrong is a sore point for people of asian descent.