islam has tore egypt to pieces.Islam was forced on northern africans and egyptains. many egyptains don't want to talk about the arab invasion of egypt that happaned around 640ad,which is why many egyptains identify themselves as arabs.
The slave trade is covered in a nice book called ronald segal called islam's black slaves.
Most of the slave population that went to the middle east was female mostly coumcbines,which really did not leave a large population.In basra iraq there is slave populations that still live there under opression.
Some positive things did come from the slavery in the middle east,such as the schoalr al jahiz,and zaryab a slave turned muscian in the abbsaid caliphte,which much of the music across the middle east comes from. Zaryab can even be called the father of flamenco.
Funny thing ius when the arabs came against the phophet mohammed he fled to abyssinia,whcih shares an ancient connection to sabea,and other parts ofthe middle east.
YOu might have heard about the siddis in india who came not against their willbut as mercenaries.
They revolted againstthe mugals and became sucessful kingdomsin india.