I can't tell if your example was meant to agree or disagree with me.
But although Miller's hypothesis is full of holes, loose ends, and self-contradictions, even if it were true, it neither confirms nor disconfirms the topic of Hitler's alleged lack of self-confidence -- being mistreated as a child and *repressing* it as Miller claims is not synonymous with maintaining a low self-confidence.
If anything, her description of someone who has "totally repressed" childhood traumas (and Miller describes *all* German childrearing of the time as "destructive") only bolsters the idea of someone maintaining an adult self-assurance (since to hold a low self-regard would be to accept and dwell on the childhood disapproval, not "totally repress" it as Miller claims).
Even if that was the motivation for Hitler's megalomania -- and I don't buy it -- the fact remains is that he was supremely arrogant, *not* self-doubting.
From Instigators of Genocide: Examining Hitler From a Social Psychological Perspective David R. Mandel University of Hertfordshire " As noted earlier, nationalism tends to embody threatened egotism within a collective ideology, and it is no surprise that Hitler gravitated toward nationalism (although his rise to power was certainly unpredictable). Hitler's nationalist identity was very much the result of his need to establish a positive social identity in light of the repeated personal failures and disconfirmed expectations that he had experienced as a teenager and young adult (see Kershaw, 1998). Because he could neither plausibly protect his high self esteem with personal examples of success nor accept his failures, he bolstered his egotistic sense of self by identifying with what he conceived of as a strong and great nation."
I guess I see Mandel's depiction of Hitler's high self esteem as narcissism and not a genuine feeling of self worth. However, I am not a student of the rise of Hitler so I'll bow out. BTW, I failed my only MMPI test, but I doggedly push on, hoping for redemption.