Not really a hard concept and not really all that worrying either.
Oh yeah I forget, down right evil people can't have at least one good idea.
Never said it was wrong to take an idea created by a bad person and implement it. Many good things were done in germany before the war - but thats often overshadowed by the horrible things that came later. That being said, many of the things being currently put in place seem to have little redeeming qualities atm, sadly.