Nazi Germany and the Soviet Union were both secular dictatorships. A genuine theocratic democracy is just about impossible anyway.
Well, the Soviet Union was a secular oligarchy, and not all that bad. Nazi Germany wasn't as secular as you right-wingers would have us believe - the churches and most religious Germans supported Hitler very strongly, and his appeals to mindless patriotism and racism were accompanied by appeals to mindless traditional and family values, as well as direct referrences to 'god'.