The Nazis were always going to go on a mad conquest-and-destruction spree... that much is blindingly obvious to anyone who's ever looked at Nazi economic policy, let alone the bloody rhetoric...
I remember reading an interesting article from the mid 1930s (from
The Nation I think..) arguing it was inevitable that Germany was preparing for a major European war because it's re-armament was fueled on so massive a deficit that it necessitated a massive expansion of the Third Reich just to pay for it..
Like you said, should be pretty ing obvious really, even without the benefit of hindsight..