That's good to know. I had heard that Schmitz was a supporter, but I guess I had heard wrong. It's my understanding that her career suffered out of the war because of her association with the Nazis, consensual or not.
As for Selpin, I'd read that what got him into trouble was intervening when members of the German Nazi attempted to molest the female extras. Goebbels ordered an apology and, when Selpin refused, he was found hanged in his cell. (Obviously not by his own hand.) I thought that he was merely against their treatment of the women on the set, but it's nice to know that he was against the Nazis from the start. Unfortunately, the screenwriter was pro-Nazi and reported him to Goebbels.
Indeed, as you said, it was a horrifying time. Even a number of actors had death warrants out on them for their anti-Nazi sentiments.
I'm sorry that I misjudged her. I'm glad to see that she wasn't one of them though. Thanks for the information.