I'm a black American who's descended from African slaves. Maybe I'm a dead, soulless, and demented loser too.
Sheeesh....
Sounds like a kooky theory to me. Most of the slaves, I have heard, came from intertribal warfare, though the bribes of the traders probably accelerated the pace of hostilities between tribes that might have otherwise grudgingly tolerated one another. If anyone proved it I would like to see that, but off the cuff B.S. like that is zotworthy.
Now one thing I could believe, and again I do so as a frank Christian supernaturalist, would be evil angels (demons) that followed the hapless slaves. But those evil angels wouldn’t necessarily be stuck to one sub-race once they got over here. They might well be involved with larger black society. All under God’s strict control, however (God is hoping the people thus afflicted will get a clue and beat these demons).