The doctrine of the resurrection was part of the faith in Osiris, Isis, and Horus, and Yahveh of Israel would have no other god beside Himself.
Moreover, the Israelites saw but little of the better side of the Egyptians.

They lived in Goshen, on the outskirts of northern Egypt, where the native population was largely mixed with foreign elements.
When they first settled there the Pharaoh and his court were Asiatic or of Asiatic descent.

And in later days the rise of a purely native government meant for them a bitter bondage and the murder of their children.

Between the Israelite and the Egyptian there was hostility from the first; Joseph began by confiscating the lands of both peasant and noble; the natives revenged themselves by reducing his kinsfolk to a condition of serfdom, and the last act in the drama of the Exodus was the "spoiling of the Egyptians.".