Freud fused Jew and Arab through the figure of Moses the Egyptian.

Evidence

In this shape, the haunting of forgetting (with and by remembering) affects yet another strange contrast that Freud would revisit when, displacing Abraham and the Abrahamic onto another “figure,” he associated “in one figure, the father, the founding father and the stranger,” the Jew and the Egyptian, Moses, and inevitably-following insistent fantasmatic projections and complex modes of denegations that were not lost on Freud and on the basis of which Egypt is to this day associated with and dissociated from the “East” and from the ”Arab world”-the Jew and the Arab. — Gil Anidjar, The Jew, the Arab, 664