The very little postquest dialogue the quest has with the menaphite citizens says that Osman is pretty much the same as the old Pharaoh. He played us for a fool.
Granted, we probably won't get the full idea of his rule if/until Emir Ali and Senliten get postquest dialogue.You never were our brightest star, Khazard. 'Vermin slaughtered like lambs'? What does that even mean?