True, they don't learn. It's partly because unfortunately, one of the traits that goes with leftism is bubble-headed idealism. You can show them on paper that there isn't a single socialist government that has ever worked the way it's supposed to, and they just say "Oh that's because WE weren't the ones trying it! THIS time we can make it work!" That's why Obama's stupid slogan "Yes We Can!" caught their fancy.
And they can't bring themselves to be realistic about anything that has to do with PC, so they can't say out loud that what they're doing in South Africa will lead to disaster because that might sound racist. No, it's called reality.
She did?! I didn't know that! And they talk about Trump. Wow.