As much as absurd as it is , people actually believe it! A crazy man could never surge to power and lead an advanced nation of 60-70 millions of well educated individuals.
The fact is that Germany had in the thirties the same reason it had 20 years earlier to join the WWI.
UK and France had huge empires controlling huge shares of the resources and markets in the world (well UK had much larger share than France, but still).
Germany had the same ambitions as those 2 nations, but didn't have an empire like those (very small before wwi, and nothing after it).
The way economy was structured back then, they needed an empire to grow.
I'm not saying they were right or wrong: I'm just saying there are not saint or sinner. France and UK appeared as peaceful nations just because they got most of the share of the cake, and thus
they had the most interest in keeping the status quo. Germany had opposite interest.
USA, were the one with most interest in having a Europe at war: it would break their competitors and they would profit from it. That's why apparently they initially seemed to sympathize with the nazi regime.