Also I find it a little coincidental that when Egypt becomes semite (assyrian and persian invasions) around 700-500BC, that is when blacks move into Kenya.
So I wanted to see if my theory was true by blindly looking up who ruled during the exact time to see who the semites defeated....and look what I find.
http://en.wikipedia.org/wiki/Tantamani
son of Taharqa
Assyrian-Egyptian King Psamtik I gave birth to Necho II. Necho II is credited with creating Egypts navy which ruled the Red Sea and was capable and being used to target Nubia down south easier. Necho also told the greeks that people lived more south of Nubia/Africa, in which the Greeks didn't believe, he sent an expedition, he discovered Nubia indeed had land further south and was rich beyond belief. He passed away shortly after. Necho II gave birth to Psamtik II. Psamtik II now knowing about Nubia and it's riches, used his ships to get revenge on the nubians for Tantamani killing his grandfather, as well as raiding and stealing from them before they got too strong. check out what he does......
Note: the nubians keep going south more and more. Til eventually they make it to Kenya.