One can argue that Abrahamic religions such as Christianity, Judaism and Islam have in Northeast Africa. And no this is not me sounding like some pseudo-Afrocentric, lets remember that the Afro-Asiatic language family which is associated with Abramhamic religions originated in Northeast African specifically around Ethiopia/Nile Valley.
Not only that, but Ethiopians practice a very old form of Christianity.
As for the current topic about African-Americans and the 4th of July? I just came from a barbecue. But to be honest, as someone who is of African-American/Haitian descent, I don't feel it was my ancestors independence that was won and celebrated...
Well, obviously the first independence day of the USA did not exactly include slaves. Its not like the African slaves cared that they were not under the king of England when they were still under the colonist settlers that came from European countries including England.
And I know you are not being Afro-centrist, its just facts. It would be nice if people stopped being so Euro-centric about everything though.