Not all Africans are of Ham. Some are of Shem and Japheth, which were the three main families that became divided in the earth to eventually become other races.
The slavery of the Israelites is seen during the time of Akhenaten and the building of Akhetaten.
How do we know this?
In the Old Testament a new engineering method is revealed. This new building method is seen when the Israelites were informed to get their own bricks and manufacture those bricks themselves. This was a new err and style of building structures in Egypt that no longer used the large pre-cut stones as was used in Egypt. The bricks referred to in the Old Testament are called the Talatates.
It is believed Akhenaten invented this new method of building because he could now recruit women, children and old people because the talatates (small mud bricks) could be carried by anyone, unlike the large pre-cut stones that required several strong men to move and place.
We know it was hard labor and extremely strenuous because Akhet-Aten was built in less the two years and could hold a population of about 50,000. This was a massive city by standards of those days.
The people who were called Israelites was the population of Akhet-Aten who continued the monotheistic ideas of Akhenaten, they were also called The Children of the Light.
You can search the web for “Akhetaten Project”. This is where several scientist and Egyptologist are rebuilding several walls at Akhetaten from the ancient talatates. You can see in several of the drawings how the people withstood hard labor and even manufacturing their own bricks just like the Old Testament records it.
Noah, Ham, Shem, and Japheth, all represent white people--specifically the Elites. Noah never had any black children until they mixed with Cush.
If you read the book of Enoch, it clearly implies that Noah was white. He had eyes(light) that lit up the room, and he was so strange to his father(Lamech) the old man thought his wife cheated on him with one of the "Angels."
I think I got that right. It's been a long ime since I played in the sand box.