Um, so King Mansu spoke arabic via the south?
Converting to Islam has nothing to do with the population there, breh. Those were all Niger-Congo people and no not by "way of East" as in they were people from the East who migrated West. They were already there.
are you serious right now.
What does this disprove? You said "East" in a discussion centered around Northeast Africa. If you are talking about the two different Bantu groups then you need to clarify that, especially since you claim Niger-Congo people are the child group of Niolitic/Cushyte people.