At this moment we are seeing the same moral outrage and screeching of pacifism fetishists as we saw during the struggle for South African freedom. It's easy to take a stand against things like necklacing or killing concert goers when you are sitting safely at home on your comfortable couch. Not so easy to wring your hands when you are staring down the barrel of apartheid and all its horrors. Palestinians must do whatever they deem necessary in order to survive genocide at the hands of their colonial occupiers. And westerners who have supported - whether in word, or in deed through the material actions of their governments - the Israeli settler project and their genocidal campaign, have no right to judge the actions of Palestinians taken in pursuit of survival.
Every time I've heard South Africa mentioned in the States, it's been in regards to it being an example of "white genocide", or as an example of how a "great country" was ruined when Black people took over. So yeah, truly not a single thing was learned.
They regret what happened in South Africa and use it as a learning resource for how they can better hold on to their oppressive apartheid systems and institutions.