It was actually the lack of dualism with the Nazis. They had no right or wrong in pursuit of their goals.
Nonsense, everybody is the hero of their own narrative. Apparently Himmler was very troubled by what he had to do, but he believed in race war, that one race would end up dominating all the others and it was better to get it all out of the way in one fell swoop. He even praised his offers who had committed real atrocities for remaining 'decent' throughout.
Goebbels may not have believed the crap he was saying but plenty of other top ranking Nazis did. Most of them believed that the Jews had brought this all on themselves, that there was a Jewish conspiracy between Wall Street and Moscow to cause the collapse of the Aryan people.
Even today there's plenty of idiots who still believe The Protocols Of Zion
is a genuine document when it's been proven it's a propaganda piece created by Czarist Russia's secret police.