I dunno. I thought it sounded reasonable to understand the situation of Hebrews and Egyptians living together in Egypt as the basis for some shared history. The commonalities, Moses being ethnically Hebrew and culturally Egyptian, the one true god, circumcision and the significance of the colour blue might indicate one came for the other.The last two, I accept, might have been shared across a huge number of cultures.The Hebrew exodus might have been the flight from Egypt (but not necessarily as the Bible writers tell it) after the priests rebelled in Egypt and went back to their old gods.