And I largely agree with the rest too, except that there is some Arab blood in most of those countries, surely. Places like Kufa and Baghdad were newly created under the Arabic regime, and largely peopled by Arabs. In Northern Africa, one would imagine the initial amount of Arabs was rather limited, but there have been migrations of Arab tribes to Egypt and even to the Maghreb in later centuries, such as the famous Banu Hilal.

And in Turkey's case, do the Turkish migrations from the Altaic mountains matter so little in terms of genetic ancestry?