the poor sod doesn't even know that Mamluks were Arabs...
http://en.wikipedia.org/wiki/MamlukThe most enduring Mamluk realm was the military caste in medieval Egypt that rose from the ranks of slave soldiers who were mainly Cumans-Kipchaks of Turkic,[1] Circassian[2] and Georgian[3][4][5] origin, although in the Burji (post-1389) Mamluk sultanate many Mamluks could also be of Balkan origin (Albanian, Greek, South Slavic)
A lot (the vast majority) were Egyptians, east Europeans and Turkish.
Guess you need to go back to your text books and brush up on who's arab and who isn't.