Assuming this is true (I have no reason to believe it's not) it's clearly a damning indictment of von Braun himself. And it calls into question his accounts, so it seems like odds are he was "actually" a Nazi as opposed to someone affiliating with the party to avoid punishment or execution.

I still don't see what that has to do with the original comment that mentioned him. If we're talking about him in depth, absolutely mention it and dig into it. I guess the thing I'm having trouble reconciling in my head is the need to, upon a passing reference to someone orthogonal to the main point, say it's "worth including" that they're a controversial figure. The controversy seems irrelevant to me. It seems to border on virtue signaling, this need to say "oh by the way, Nazis are bad" when that (objective fact) has nothing to do with anything.

I see your other comment and I get the point you're trying to make but I don't think it has anything to do with speaking respectfully or with any sort of courtesy about a Nazi, just about trying to make a point.