This style is definitely imposing, but I don't find it intimidatling per se. Many Churches have the same style--a neo classic somewhat Italianate look of heavy stone and archways. In fact, many college campuses have buidlings looking much the same. The strength it suggests woulld be attractive to most monarchs or dictators or elected officials who think they are dictators, so it might not be fair to the Hohenzollerns to label it particularly hitlerian, imho.