He has put forward a number of theories, some revisionist in nature, about Ancient Egypt and the origins of Islam, Judaism and Christianity.
In an article in The Jewish Quarterly Review Egyptologist Deborah Sweeney points out that to do this Osman "revamps the biblical text drastically", that he has used ideas about Egypt that have been shown to be wrong, and that Yuya's belief in multiple gods and his position as a priest of Min does not equate with Joseph's monotheism.
[1] Ahmed Osman has also claimed that Moses and Akhenaten were the same person, supporting his belief by interpreting aspects of biblical and Egyptian history.
This would mesh with Osman's other claim that Akhenaten's maternal grandfather Yuya was the same person as the Biblical Joseph.
A number of Osman's positions are in conflict with mainstream Egyptology, including conventional Egyptian chronology.