You mean it's offensive because it's a cheerful song being sung by a black bloke? Even though it's not a song that's specially associated with the Minstrel Shows? If you're black, get back and sing soul or rap or blues, and leave funny songs to the white blokes...

Strange. (It didn't even have any fried chicken in it. Unless you mean that mention of breasts, which I didn't actually take as referring to chickens.)