A lot of what the Nazis taught had a lot of support at the time: for example, there is a picture of Queen Elizabeth when she was still a child being taught how to make a Nazi salute by her uncle the then King.

The whole idea that some people are born superior to other people and associated things like racism, anti-LGBT beliefs and even Machism were very popular back then in the West, especially amongst the elites (who, naturally, wanted to believe they deserved their inherited priviledge because of being superior people). A lot of that is still alive though frowned upon hence unvoiced.

As a side note an trying not to derrail the thread too much, this is why when Zionists and Israel claims to have "Western Values" most of us in the West don't recognize it in what they do but they're not quite lying: the whole etnically uniform state whose majority see themselves as superior and thus act in incredibly racists ways both towards local minorities and other etnicities who they want to exploit or whose resources they want to steal is not quite as much part of present day Western values (well, not openly and to quite so extreme levels, though just look at what the US has done in the Middle East to see the ideas of inherent superiority put into action) but it most definitelly was absolutelly standard in Western thinking back in the early part of the XX century.