It's pretty well understood by Bible scholars that the African black man descended from Noah's son Ham. Genesis chapter 9 says that Ham was/is the father of Cain, who was in fact the son of perdition, and is often called the first murderer or the lawless one.
Methinks you're a very confused individual who doesn't know his Bible very well. Ham's son was Canaan. It says so in Genesis chapter 9 - "And the sons of Noah, that went forth of the ark, were Shem, and Ham, and Japheth: and Ham is the father of Canaan."
Cain was born from Eve, whom preceeded Noah by quite a while in Biblical chronology.
