The first few chapters of The Devil's Chessboard cover this extensively.

This time period is interesting. I really like David Pietrusza's books. He focuses a book on one year in history and the tales of significant figures. 1932 is a great book on that year covering FDR and Hitler. Not really a book on what I was talking about but there is a lot of interesting things covered.

I'm trying to remember specific books but it was something that is just kinda mentioned in passing a lot. The holocaust really triggered a white washing of anyone promanant's positive positions on Hitler.

I mean you can look at the polices of the US during the war to see fascism in action. Also Hitler spoke highly of many US policies. I think in the US we are conditioned to kind wave away our concentration camps, witch hunts, and partnerships between state and corporation. What is most fascinating to me about this period of history is how seemingly open and support the population was with collectivism(fascism, socialism, & communism) both in name and function. Its why the whole world view of conservatism fell apart on my in my 20s. What are they conserving? A rotting corpse of liberty?

I can't vouch for this article but it does mention one elite that I've heard about before. https://www.thehistoryreader.com/historical-figures/hitlers-american-friends-henry-ford-and-nazism/

Prequel by Rachel Maddow discusses this in detail.