Probably because he says things like “son” and “boy”.
wow....
Indeed, as one of the other comments says:
>>While I agree the question is basically idiotic, hopefully there were good intentions behind it. Case in point: I work in Virginia. A few years ago, I watched a young female co-worker, conversing with an African-American male co-worker, say to him (in jest), Dont give me any trouble, boy! He immediately wheeled around, clearly upset, and said, WHAT did you call me? I had to explain to her that the term boy has a history as a racial slur, especially in the south. She had no idea.