First impression. The idea that the Nazis were involved in a caste system speaks to poor research skills upon the author. Rosenberg is quite critical of the caste system that developed in post Aryan Hinduism.
The term Aryan is synonymous with the Germanic tribe and constitutes tribalism, which the author appears to find unappealing. I’ll need to finish the book but the first few pages have been less than impressive. I also see no connection between Nazism and racism. They are distinctly different giving that one represents a tribal survivalist nature versus poor thinking skills.