"...we could have gone into Germany and killed every man and boy in Germany and taken all of their women as our slaves or wives, justifiably."
Not. It appears a widespread prejudice all Germans were and are equal. There were tens of thousands of Germans that were working against the Nazis and risking their own lives in doing so. Within a resistance group called "White Rose" Hans and Sophie Scholl were only the most prominent casualties:
Sophie was arrested exactly 52 years before yesterday, on February 18th, 1943. She was taken to the Guillotine four days later.
Apart of these active resistance people, millions of other Germans didn't like what was going on, alas the SS had very "convincing methods" of getting "support" by the public.
"When we think of Nazi killing, genocide immediately comes to mind, particularly that of "6,000,00 Jews." But they also murdered for reasons other than race or religion. For one, the Nazis slew those who opposed or hindered them, whether actually or potentially. This was why Hitler assassinated hundreds of top Nazi SA's (Sturmabteilung)4 in June and July 1934, who under Ernst Rohm were becoming a strong competitor to the SS (Schutzstaffel); or executed perhaps 5,000 Germans after the 1944 plot on his life and attempted coup d'etat. Indeed, it is why critics, pacifists, conscientious objectors, campus rebels, dissidents, and others throughout the twelve-year history of the regime in Germany, were executed, disappeared, or slowly died in concentration camps.The Nazis thus killed some 288,000 Germans, not counting Jews, homosexuals, and those forcibly "euthanized." If these are included, then the Nazis murdered at least 498,000 Germans, probably 762,000. As shown in table 1.2, this was one out of every hundred Germans."
But I also agree about Ferdinand Porsche, that would have been a big loss to this day. So would have been Werner von Braun, that loss would have gotten the US to the moon at least 10 years later.