Earlier quoted context omitted.
North Africa was christian? The amazigh were animists, and Islam was present before any large scale invasion, and was mostly spread by amazigh tribes themselves. (at least in the case of Morocco)
Well, Egypt certainly was heavily Christian. I had assumed that most of North Africa was, because it had been Roman, and the Roman Empire was heavily Christian post-Constantine.
It's mostly because you said "all of north Africa" that I wrote this response; being from Morocco, this was surprising.