Also a fun fact - Northern African countries are predominately Caucasian which, while this group possesses a varied skin tone, is not what we refer to as "black", like we consider the term "African American" to be. I mean, if these people moved to America:
Would you call them African Americans?
EDIT: Also, looking at a historical perspective, the three monotheistic religions, Christianity, Islam and Judaism, are all rooted from Egypt and the rest of the Middle East and, thus, based in Caucasian history. The prevalence of these in religions in the other races, such as those Southern Africa and East Asia and among the American aboriginals, is purely a product of colonialism, as most of these groups had other belief systems (now, pretty much lumped together as some form of Paganism) that were swept aside by European and Persian conquerors.