Contrary to your choice of first, second and third aims, I would order them by the amount invested in each one. Judging by the investment of lives and treasure, the Eastern Front quest for Lebensraum must have been the top priority for the Nazis. Of course this does nothing to reduce the moral degeneracy of organized murder, whether against Slavs, Jews, Roma or any other of the victims.
Second rocket fired from Gaza explodes inside Strip (Haaretz)
from the article: Not all Holocaust scholars appreciate this new reading of WWII