much of American nazi ideology

I don’t know about “much of”, but the Manson family had something along those lines.

https://en.wikipedia.org/wiki/Helter_Skelter_(scenario)

The Helter Skelter scenario is an apocalyptic vision that was supposedly embraced by Charles Manson and members of his so-called Family. At the trial of Manson and three others for the Tate–LaBianca murders, the prosecution presented it as motivating the crimes and as an aspect of the case for conspiracy.[1] Via interviews and autobiographies, former Family members related what they had witnessed and experienced of it.

In both the trial and his subsequent (1974) book, Helter Skelter: The True Story of the Manson Murders, prosecutor Vincent Bugliosi presented evidence that, in a period that preceded the murders, Manson prophesied what he called Helter Skelter, an apocalyptic war that would arise from racial tensions between black and white people. [2]: 311  The prophecy involved reference to the New Testament’s Book of Revelation[2]: 238–44  and to the Beatles’ music, particularly songs from their 1968 White Album.