Monsters like children of white supremacists or the SS sound dangerous but it all depends on how they were raised and carefully taught.
My step dad Nate was 100% Jewish.
He was a clerk in the US Army in London but saw action in Germany at the end of the war. By clever paper schuffling and clerk magic fairy dust he managed to adopt me from a Liebensborne orphanage in Dusseldorf at the urging from a rabbi that said it would be a mitzvah and atonement for killing nazis. While most GI's were bringing home booty, my step dad brought me to America to meet my step mom in the midwest. My biological parents were probably strangers to each other but its unknown with no German documents. As a pig in a poke I was probably a disappointment since I was not a scholar or avid reader early on due to dyslexia I discovered decades later. I did very poorly with languages.

Starting with Hebrew study to be bar mitvahed I was given the choice of religious studies or not. I chose not, but more or less I identified with the culture.
Later on I heard that Ghandi advised a Hindu to adopt a Muslim man's son after the tragic killing of the father and bring up the boy as a Muslim to attone. There were a couple of moral parallels with my adoption but sort of opposite to my history. One thing is for sure - I'm walking proof that there was no German master race unless it was Eienstien .
One possible irony was that my first girl friend, Priscilla Stephanie von Dieseldorf, from Guatamala was the child of a German couple who escaped Germany in the 40's and joined the grandfather who was an archeologist unearthing the Mayan civilization.
What does all this mean? Mostly that Ancestry.com would be a waste of my time, nurture trumps nature and that kids of the KKK turn out krazy if raised by dad. :^/