No, it’s pretty true. Wernher von Braun, for example, oversaw a pretty terrible work camp when developing the V2 rocket. He wasn’t what you would call a “Nazi” in the sense of “let’s exterminate the Jews and conquer the world” but more of a classic amoral scientist. His overall attitude was “I wish these terrible things weren’t happening, BUT—have you seen what we’ve discovered and accomplished?”
And realistically, what could he have done? In the middle of an avalanche pebbles don’t get much of a vote.
Vunce za rockets go up, who cares vere zey kom down, that's not my department...[-Tom Lehrer].
He didn’t oversee the camp. He did visit and knew what conditions were like, but he didn’t run it and its not like he was in any position to stop it.