If you want to know what made the Nazis, the Nazis, and not just "one of many fascist regimes in the dustbin of history" it was this - the murders were systemic, and logistically organized through an integration of the whole state and society, for that purpose. That's how you rack up the kind of body counts we saw in the Holocaust.
And I'm sorry, but reading the newspaper is keeping me awake at night because I'm watching us building a streamlined fascism machine that only ends in one place.