Nazis admired a lot of things from the US: eugenics, the genocide of the Native Americans, anti-semitic oligarchs like Ford.
The way WWII went made the US pump out anti-nazi propaganda to support its fight against the horrible regime. Let’s not forget that before, and after WWII the US Government supported many fascist groups as long as they were anti-communist. It was just convenient to foster anti-nazi sentiment during the war, especially with strange bedfellows like the USSR after they were betrayed by Hitler.