I think it's a bad take. Exposure to fascism doesn't magically turn you fascist, it's material conditions and propaganda and being a garbage human being that turns you into a fascist.

Not having a judicial process during stable, peacetime conditions permits martyrdom and conspiracy narratives to spring up. I'd rather have Mengele on the stand saying that he'd do it all again because he believed that some groups of people are subhuman trash whose only use is to be subjects for medical experimentation rather than giving him the aura of mystique and government coverup "because they don't want you to know!!"

No. We should know exactly how awful it was, how horrific these people were. Let's hear all about it. Let's hear them say that they felt unmoved as one of their victims begged for mercy and lets hear them say that they'd do the same for anyone's parent, child, or loved one if they happened to be one in a group that was deemed "subhuman".