You are so very correct however a word to the wise I made the same point about three weeks ago and congressman billybob lit me up as a racist.
The African-American culture is a mixed-race culture, like most if not all Native-American cultures today. A mix of traditions and the surviving Africian traditon is less important than the American experience. Its a southern culture. Many years ago I read a Scientific American article which had it that one-third of all white southern families had some back/indian ancesters and two-thirds of black families had some white.indian ancestors.