Most of Southern Africa was uninhabited until recently.

About 500 AD the Hottentot (Khoi) and Bushmen (San) migrated into the region and became agrarian pastoralists...

About 100 years before the arrival of the whites (before 1650) the Bantu tribe swept into the area, killing the blacks already there, taking the best land.

The Bantu view the San people as inferiors...The leaders of Zaire (Congo) and Botswana use race-baiting politics to garner support- Blacks versus the desert dwelling San (and Pygmy).

President Idi Amin Dada of Uganda admired Hitler, as does his current successor, Museveni. Museveni thinks that if people are dumb enough to get caught in a refugee camp, then they ought to starve. Bantus and some other tribes where their chiefs rule, consider themselves superior to other blacks, and practice racism and genocide against each other (the Rwanda tragedy of the 1990's being the best example-hundreds of thousands butchered with machetes in a few weeks time- it was also a disaster for the mountain gorilla- refugees swamped the nearby national park and began eating protected animals. The UN has documented instances of cannibalism...)