So many strawmen... You should come and work at my farm.There are accepted definitions of ethnicity however, and Egyptians, particularly Copts have a definitive ethnicity that is widely accepted. Barak Obama is an African American and therefore commonly referred to as a Black person, in which 'go down south a bit' places would he be considered not black? As a rule social convention generally refers to a Black ethnicity in the context of Africa as being specific to sub-Saharan Africa rather than the various ethnicities in North Africa such as the Berbers, Arabs and so on. (There are also other definitions including Aborigines and others, although I have not come across any anthropological or social acceptance of the term relations to Arabs or Berbers)
And although they are all Popes, they are not all The Pope in the context of this thread as the title Pope simply means Father and it a bit of a stretch to make the argument that answers the question for both the reasons I gave previously.
I also already gave three examples of North Africa Popes of the Catholic Church and how none of them are universally considered to be Black Popes, either by the Church or by commentators. If they were then I am quite sure the Vatican would point to them when being criticised for not having a Black Pope.

As for the rest, fair point. I am aware that the Coptic Pope is not a Catholic.