I'm not fully up on how South Africa culture is, but I thought they fell pretty hard for the identity politics rhetoric.
Look, I know our human minds can only take so many factors into account at once, so it's easy to simplify and condense large amounts of information and possibilities into sweeping generalizations, but Africa isn't all barbaric. I just zoomed in on Zimbabwe and they have some sprawling cities that could be confused for something in America.
For the life of me, I can't remember the positive example I'm searching for. There's at least one all-black country in Africa that sends over some excellent migrants that are culturally at odds with the American blacks. The problem is, I can't even remind myself which country it is because when I read them on the map, I'm falling victim to the same thing I wrote above. They are all African countries in my mind, so they are all the same. If I get reminded of it later, I'll post it. But the point I wanted to make is even "low IQ races" don't have to behave like negative stereotypes. It's really down to how they were raised and what they deem is acceptable behavior.
Stealth edit: I just searched "Most christian African nation" and Nigeria came up as second place, which was one of the countries I was leaning towards being the answer I wanted. Point being, religion and culture plays a much bigger role than anything here. You don't get Christian African warlords. Houseman may be one of the good ones in your mind, but it's because he was raised correctly and isn't looking for a victim to take advantage of, which is very not Christian to do. You get enough people acting like him in a region, and suddenly that region is going to look like an exception to you, rather than the proof I'm trying to put forward that it's not really about race and IQ first.