You're right that hitler wasn't directly elected into power. Hitler came into power due to a loophole in the German constitution which essentially gave him emergency powers and allowed him to install himself as a dictator. He said all the right things and claimed he was going to right all the wrongs that the German govt had previously committed (including completely devaluing their currency). The Nazis were in the right place, saying the right things at the right times. People act like his ideas were his and his alone but a surprising majority of the world shared the same ideas of fervent nationalism/militarism, xenophobia and antisemitism, including in the USA. The more you look at how these extremist governments got installed, the more you can see the underlying ideological connections. There's actually a surprising amount of history books that explore this aspect of WWII and how all those ideologies manifested in different governments. I'd really recommend checking out A World At Arms by Gerhard Weinberg, Fall of Berlin by Antony Beevor, and War Without Mercy by John Dower, those should give you a really good overview of the war as a whole. Hitler got the idea for the final solution from Marx, mixed it with eugenics/the general concept of scientific racism (which was prevalent worldwide, including in the USA, where eugenics was conceived). If you want to hear the most absurd example of scientific racism black people in the US were not allowed to donate blood due to people believing they were a different species/their blood would be incompatible with white people. http://theconversation.com/desegregating-blood-a-civil-rights-struggle-to-remember-37480 https://www.atlasobscura.com/articles/in-the-early-1940s-the-red-cross-banned-black-blood-donors It's really unfortunate that there's still kind of a "war on science" being waged by the ignorant and lazy. I still see people trying to perpetuate disproven ideas about evolution or vaccines because they're too lazy to spend some time getting information from credible scientific sources. They'd rather take buzzfeed level hokum and mommy blogs written by people with no scientific background as gospel. I honestly feel like we're inching closer and closer towards a real life version of the movie Idiocracy.