The northern peoples were colonizing (Lower Egypt) the north of Egypt where the first Pharaoh Narmer came from. Phoenicians and even Greeks had their colonies in Goshen as well early in history. Remember Mycenaean had Hieroglyphs too. The Egyptians and the Greeks have a long history, When Alexander came to Egypt after he defeated Darius the first time around at the Battle of Issus, the Egyptians considered it liberation from the northerners since Cambyses who used cats on shields to deter the Egyptians from shooting arrows or throwing missiles, as the Greeks were old friends (Zues-Amon). The account in the scriptures is using what was known and understood about the northerners like Abraham going south, way way way before, there was ever a Moses, let alone after. The north and the south of the middle east continue to be at odds with each other and always will.
Why the traditions in the bible are not accurate, is because they had to retell history in a form that came from the one God, instead of having Gods that had sex with other Gods to have more Gods as a way to explain things. Polytheism was kinds messy and the Jewish bible even if it's a lie from the start to teach their own people (because it was meant only for them but was translated by Greeks out of their hands) to not believe in other Gods and the other cultures that surrounded them were all polytheistic.
That is why the Ten Commandments. Because the ancient ancestors of the Jewish people were polytheistic and the reaction was to fix it with the education you would receive from the bible and it's stories that have been being told in many different ways, like the Noah story only that now it is their lineage and their one God.
The thing about Greeks is they have a long history of having atheist/agnostic peoples who did not believe in the many temples and Gods and in some of the traditional stories they express the notions through characters that portray a God vs Humans mentality and had secular teachings making for philosophies such as Stoicism and Epicureans. They were very intelligent and questioned the traditions of the Jews leading to apostasy through the Maccabees leading into Christianity, because Jews felt oppressed by their ultra conservative ways and started to question much of their own leadership and temple, much like Jesus did.