Yeah, the murder rate is high, but not so high it would negate the birth rate
Where South Africa falls under genocide is that the state of the nation is so poor that whites are fleeing the nation faster than they can be replaced. We are heading towards a future where all white south Africans will have either fled or been killed, which is a genocide according to international treaties
But a lot of people won't acknowledge it as a genocide because ethnic displacement only counts as a genocide when it happens to brown people, and it's uncomfortable to admit that the rainbow nation failed