why did apartheid last so long

the whites went from a sizable minority to a tiny minority in 80 years... other african countries could supply the sa blacks with ak47s rpgs mortars what would they need more to overthrow the whites... its easy to recognize the enemy... the color of their uniform is the color of their skin... yet they didn't, the whites gave up themselves... i really don't understand this

>>2
south africa is the most modern, most highly industrialized, and wealthiest country in Africa ?

what about Egypt? Sure, its a shit hole but at least people don't rape babies to cure AIDS or shoot you for your mobile phone