What's so bad about Nazism?

What is it about Nazism that people find so abhorrent? What are those elements of Nazism that we recognize in the words and actions of the politically empowered that make us rise up and say “no more”? Is it the harsh lesson of how quickly the forked tongue of a charismatic leader can whip up support to condemn a whole race of people to extermination? Is it the uncanny ability to identify the next despot, paving his or her road to political victory by spinning tales of unearned wealth and privilege accruing to an elite minority? Both sides of the contemporary political spectrum increasingly invoke Hitler to raise the alarm about the imminent danger of the next fascistic regime. It is however, towards the left that I pitch this question, because the Hitler-Nazi-Fascist triad has largely been invoked by the left to foreground the re-emergent politicization of race, and valorization of racism. And while I certainly do not condone racism I believe that this focus is detriment...