Egyptian civilization was effectively white, or at least not a sub-Saharan-African civilization, regardless of what Afrocentric academics might say. The Egyptians were part of the culture of the Fertile Crescent of the Middle East, consisting of the Nile valley, Phoenicia (Lebanon and Israel) and Mesopotamia.
Agriculture originated in this region, probably around Sumeria, and spread out. I would not be surprised if Ancient Egypt was settled by Sumerian agriculturalists spreading out from Mesopotamia, down the eastern Mediterranean coast, and down into the Nile, exterminating any prior hunter/gatherer tribes that may have been there.