You are actually saying that "Baby Mama" has NO RACIAL BACKGROUND! None. Wow.
That is absurd. The term "Baby Mama" came to prominence through black culture, and became a slang term associated with black culture. Whether its origins can ultimately be traced back to Jamaica through wikipedia doesn't change that. YOU sited a movie that derived humor from the fact that "Baby Mama" is a black cultural slang term. But you still deny that it has any racial connotations?
You are correct in one thing: Your headline. The rest is rationalization.
Fo shizzle, my friend. Fo shizzle. (I think that derives from ancient Hebrew).