What is there to see here? Actually surprised there were blacks in this guys employ.
Koreans have never liked black people and vice-versa. Rewind back to the LA Rodney King Riots and how a large percentage of looted and burned out businesses were Korean owned, no love lost I can imagine.
Hell, Korea has been getting its shit stomped for centuries as the Chinese and Japanese armies passed through to engage each other. No doubt they have a chip on their cultural shoulder.