In a bleak sense I suppose I can understand, it's not as though they can have a big, "By the way, we greedily assisted the Nazis with the worst act of industrialized murder in modern history, profited from it, were never held to meaningful account, and we're still successful," room.
And examples such as "de-Baathification" in Iraq show that even the best-intentioned actions can have wide-reaching and truly devastating unintended consequences. I won't pretend that I have some neat and clean answer to any of this, but there's a persistent sense of moral outrage that feels earned around all of this.