technically nazi stands for national socialist and is a political ideology, and white nationalism and white supremacy are supposedly different things, but i'm not gonna split hairs over hate-filled shitbags
The appreciation of Hitler puts them firmly in the Nazi category for me, probably incurable despite my previous protestations that people can change.
Holocaust denial might simply be a product of pure ignorance and/or severe retardism I suppose, but probably a Nazi.
It's weird, you'd think real Nazis would be proud of the holocaust and not trying to deny it happened.