Hitler. . . lacked the [inclination] for anything more than the occasional sensational display of emotion, in particular the great set-piece speech which mesmerized the mob and left him drained of. . . energy.
Well, I think in trying to make life seem real enough that one is moved to do something about the more atrocious things. By going really far afield into a completely fake world, maybe there's a chance to make things resonant somehow - or in this case, truly terrifying. To make it as bad as the real stuff that's happening.