I can't see how the delay in regard to Ann Boleyn has anything whatsoever to do with royalty being anachronistic, It's how England works, and I'm sure that'd be just the same without the royals.
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The question of why there was sympathy for Hitler a part of it surely was the kind of tunnel vision we get when trying to make sense of a frightening and complicated world. We identify an enemy that scares us, or horrifies us, and look around for who is against that enemy, and then we set aside the nasty stuff about that person. So we look at the Bolshevists and see Hitler as a defence, and pass over the stuff that sounds bad - maybe it's exaggerated. Or we focus on Hitler, and tolerate Uncle Joe. Or in the modern world we pick on Assad, and for as long as we can we overlook or deny the fact that his most effective opponents were Islamist fanatics.

As for appeasement, it's too easy to forget that it was only a very few years since tye nightmare of the Great War. It's no wonder that anything seemed better than going throught that again. "Appeasement" wasn't a dirty word while there seemed any desperate hope it might mean avoiding a new, and far more deadly, war.