If you remember Casablanca, you'll recall that Rick is a man who begins the film dead on the inside. His heart is broken, he is an alcoholic, he's perfectly neutral, and he doesn't stick his neck out for anybody. But as the film progresses Rick rediscovers his own life again and goes on to take a roll in the war.
"Moloch" shows us this reverse story of the anti-hero Rick. Hitler is the negation of an anti-hero, someone who probably began life off-screen perfectly moral and alive. But his desires and fears have made him a monster, dead on the inside.
People who destroy life do so because they are afraid of their own deaths. Any child who has a momentary fright in contemplating death may respond by killing an insect or a small animal and taking succor in the control over life and death. This is how evil might begin. Thus Sokurov films the vulnerable, underwear-clad Hitler of the everyday in a state of child-like fear of his own death, nearly all the time.
But the real damnation of the killer is that in the end even perpetrating destruction will not ward off the ghosts of the mind. "Death is death," reminds Eva Braun, helpfully. Like Rick's Ilsa, she knows the whole time the true source and purpose of life, knows it down in her bones. But poor Eva has no Rick to work with, and eventually her efforts to liven Hitler only bring up her own worst fears.
Pretty nice example of classical plot structure with negation of the anti-hero!