In OTL, Albert Speer (Hitler's architects and an important member of the Third Reich) was one of the very few Nazis who owned up to what he had done. After his release, he had talked of returning to his old job of architecture, but nothing ever came of it, and he spent his remaining life talking about the experience until he died at age 75 in 1981 in London.
Now, what would have been if Speer, knowing well of his past and truly wanting to change it all, came back out and became an architect again? Would it change anything? Could he build a monument to the people the Nazis killed? Maybe even gone to Israel at some point? His plans for Berlin would never be considered, but perhaps he might have something to allow him to be known for instead of just being one of Hitler's killers?
Now, what would have been if Speer, knowing well of his past and truly wanting to change it all, came back out and became an architect again? Would it change anything? Could he build a monument to the people the Nazis killed? Maybe even gone to Israel at some point? His plans for Berlin would never be considered, but perhaps he might have something to allow him to be known for instead of just being one of Hitler's killers?