What stops the world becoming South Africa?

[Cornfed]

Since the inevitable white genocide in SA is reaching the only logical conclusion that it ever could have, I thought I would ask libtards on the forum just what is supposed to stop this happening everywhere? If you continue to feed an r-selected species, what stops them from outbreeding and devouring the human population before dying off themselves? Do you think the situation in Europe and elsewhere will be better or worse in a year or two? What is your excuse for not openly advocating the only viable option now, i.e. the culling of black populating before returning the survivors to the wild? How can you live with yourselves while not doing this?