It seems like a reasonable assumption that, as of 2021, the majority of people who read Mein Kampf or watch Triumph des Willens are not Nazis, but rather people

It seems like a reasonable assumption that, as of 2021, the majority of people who read Mein Kampf or watch Triumph des Willens are not Nazis, but rather people who are curious about the history of Nazi Germany for normal, good-faith reasons. If your personal attitude towards the Nazis is "never again", as it should be, you ought to be interested in how it happened the first time. Part of how it happened the first time is that a lot of Germans actually voted for them and many of the others just sort of went along with the program. Why would they do such a thing? How do I make sure I'm not fooled the same way they were? These are some haunting questions. I, myself, have watched this sort of primary source material on YouTube, e.g. subtitled videos of some of Hitler's speeches. You might assume that Hitler spent most of his speeches ranting and raving, but he spent a lot of time hiding behind the mask of a responsible politician promising to reduce unemployment. I think watching that stuff helps to answer those questions. And, as I recall, I don't think I actually went out of my way to search for it, either.