Exactly, CW, exactly. This is what old cold warriors like me were trying to prevent when we backed the old regimes in Rhodesia and South Africa. The Soviets used Cuban proxies in Angola- and elsewhere- to spread communism. You've probably run across some of my link collections about it.
People like myself believed Apartheid a bad systmem, and a wrong system-- but one which could be replaced by a better one. Sadly, something far worse booted it out. Just as we had feared.