West didn't ignore apartheid, they quietly supported it, because USSR supported Mandela and anti-apartheid struggle. Kinda "enemy of my enemy is my friend".
IMHO that was the stupidest position of the US, they should've "united" with USSR on anti-apartheid position.
That is why the west supported some terrible regimes, including Apartheid South Africa and Pinochet in Chile. Because they could claim to be "anti-communist".
Maybe, but not one of nearly the same strategic importance (and lobbying/PR prowess) as Israel.
The new regime in south Africa has some nostalgia for the assistance offered to them by the USSR back then, that is why they abstained on the vote on UN resolution against Russian attack on Ukraine.
In some ways it was a proxy war.