"invoking Lebensraum" sounds so awfully off. You apporach this discussion in a condescending fashion, yet you sound rather... superficially informed. "Lebensraum" is not a program that gets "invoked". It's the German word for "habitat" or "living space" and was not as prevalent in Nazi ideology as especially US-discussions make it seem. Furthermore, "Lebensraum" alone is not a Nazi-thing. It's "Lebensraum im Osten". "Lebensraum" is a word that's common in German today. "Der Lebensraum des Pandabären ist in Gefahr" "The habitat of the pandabear is in danger". So whenever someone starts yelling "Lebensraum" and starts to act smug in Nazi-debates, they actually disqualified themselves to German ears.