I wonder though, maybe South Africa was easily made a pariah state in the 90s because it was the end of the Cold War. SA’s utility in geopolitics to contain communism had run its course. Meanwhile, Israel is situated in still tense Middle East, and the main reason US still support Israel is because the latter provides excellent intelligence gathering which they provide then to the US and the West.
Apartheid ended in 1994 with the election of Nelson Mandela, which is 4-5 years after the fall of communism.