If I recall, it was certain Christian theologists who first put forth the idea that blacks were a result of "the mark of Cain." In other words, Christians at one point (and many still do) believed that blacks were a result of a curse.
Here's an interesting conundrum for you Christians: if this "mark of Cain" scenario is not true, then explain the difference in the phenotypes of the various "races" of humans. If we all descended from Adam and Eve, why do people on different continents exhibit noticeable physical differentiation? See where this is going?
You can't have it both ways; you can't say we all came from Adam and Eve and then reject evolution at the same time. Either you accept that all humans derived from a single ancestral source and then evolved different characteristics based on environmental factors, OR you must say that God created numerous populations separately at the same time (which the Bible rejects).
The Bible's story of creation does not reject evolution, it actually embraces it. There is no other explanation.