Lmfao, it's "just a hypothesis"? What? And your claims that black people only come from Africa are implying what, that white people were just created from magical fairy dust by some imaginary deity in six days? Seriously?
It was a definitive and conclusive study. You don't even know how science works.
Here, I got something that'll cheer you up:
Yes, it just a hypothesis.
Go home, you have a poor understanding of what you are talking about. You think ancient Romans where Christians (they never were, except at the very end of their Empire).