although there was military cooperation between south africa and israel, israel did not help with south africa's nuclear program. had israel done so, south africa would have had a developed nuclear arsenal. at the time the military cooperation took place, for a span of a douzen years, israel had no choice given the boycott placed on her by huge numbers of the international community. this should serve a lesson to those who want to boycott israel. it is not a good idea to push a desparate country against the wall. in any case, other countries in the west have done much, much worse.
UN Security Council condemns North Korea launch, vows action (Reuters)
from the article: Israel denies offering nuclear weapons to Apartheid South Africa