The ancient Egyptians might (I am being a devil's advocate here) not have been exactly Black. Blacks did exist within the Egyptian kingdom though. Before you neg me read the links below which are very credible links:
Eurasian peoples migrated from Egypt to populate the rest of the world.
http://www.cell.com/ajhg/abstract/S0002-9297(15)00156-1
not only that, there was a "back-to-Africa" migration from the peoples of Arabia...
Early Back-to-Africa Migration into the Horn of Africa
Why do Northern European White people keep coming up with these wild ass crazy theories as to who the Egyptians were? The shyt just sounds straight up crazy, especially considering that the Greeks had seen the Egyptians and had studied in Egypt for generations; and they stated that the Egyptians were Black people .
Take it from an White Egyptologist who has actually studied the culture and the people in Sub Saharan Africa:
"...The prevailing consensus is that the ancient Egyptian civilization was home-grown on the Nile Valley. But new discoveries in the Egyptian Sahara will challenge this consensus, and show that the origins of the pharaohs hark back several thousands of years before the foundation of the dynastic period (c.3000 BC) and, furthermore, that the first 'Egyptians' were from a black Sub-Saharan race coming from the Tibesti mountains in northern Chad some 12,500 years ago. The oldest known 'astronomical' megaliths in the world, those of of Nabta Playa are examined in this presentation."
Do you even wonder why Egyptologist have been digging in the Sudan in recent years?