At school in the 1950s in West Sussex, England, we often sang this song, and,since PC hadn't been invented , we always sang "big buck nigger" etc.. I suppose it would be a serious offence today ,but that's life in the modern world, I guess.Of course, we "whites" continue to be abused by all and sundry, and are called "white trash" and "honkys" , but we are above complaining and have more important things to worry about , to be honest !!