They were mixed towards the end but definitely not during that time period. it would have been rare to see a white person in Egypt during those times so it makes me wonder if the admissions that the Exodus is a false story are true. If not that would mean Joseph was Black or could pass for being Black.
All the Copts dont look like the ones in your picture.
Well... Yea. That's why I said the Copts were mixed.
However, so were the Ancient Egyptians. Even before the Babylonians, Persians, and Greeks showed up, Egypt was being invaded, conquered, and just generally mixed with several different groups for several centuries, ranging from the pure blooded African Nubians (time immemorial), to the Middle Eastern and Indo-European Hkysos (2000 B.C. to roughly 1800 B.C.). There were a even a couple of Hkysos and Nubian Pharoahs, if I'm not mistaken.
This makes it kind of hard to tell what race the "original" Egyptians might have belonged to. At the time of Exodus, however (1300 B.C. to 1200 B.C.), we do know that they would have been fairly "multi-ethnic" as a people.