"The visual diversity of population centers increased as contacts became more common between Egypt and Nubia, and then Greater Egypt, Palestine and Libya," she wrote. "In ancient Egypt as a whole, people were not designated by color terms, and slavery was not associated with darker skin," she added, highlighting a flaw in Scott's casting ? fair-skinned people were not considered above dark skinned people in ancient Egypt.
Further, Egypt was invaded and conquered by different groups of people, like the Nubians, Assyrians, Babylonians, Persians, and Macedonian Greeks. Taking DNA from Egyptians during the height of these invasions (e.g. Nubian rule vs. Macedonian Greek rule) could yield different DNA results.
http://www.vox.com/2014/8/4/5955253/Hollywood-egypt-white-people-exodus-gods-and-kingsThis article is about how they usually cast white people to play Egyptians. And this makes people think they were white and darker people were slaves.
It sounds like a pretty cool place to me.. Like a place where different people meet and this also makes it difficult to prove it is just one race who build the country.