Don't lecture me about the war. I know all about the Weimar Republic and Hilter's rise to power - about the treaty of Versailles, the League of Nations, the failure to act against Hilter in the Rhineland, the surrender of the Sudetenland by Britain and France, the occupation of Czechoslovakia, and all the little hints that Hilter was a danger that my country and France failed to heed because we were so eager to avoid war.
And to state 'only High Ranking officers' knew about the mass murder (or at least, went along with it) is a very simplified version of the war. Ask the Russian's or Pole's, in who's towns and villages where frequently destroyed by German army units because they weren't important enough to expend soldiers on taking. Not to mention, a few evil men can't implement a plan of that scale and scope. Regular army units where used to police the Warsaw ghettos, although I will admit probably only SS units where involved in the operation of the death camps.
Ok, not all of German army took part in Hilter's plans for mass murder, but they helped execute the detention and then murder of Jews, Poles, Slovics, and any other 'inferior peoples'. Some Germans did resist Hilter, but bluntly, these efforts only represented a small fraction of the population.