I disagree. He's refused to condemn far right groups like the Proud Boys, but he's not a Nazi and the percentage of Nazis that make up his die hard fanbase is very low, because any Nazi that is worth his salt would hate Trump and the Republicans as much as the far left does, and you'll find that most of MAGA hates Nazis too. Not because of their ideology per se, but more because they were one of, if not the biggest enemy America ever fought and being a Nazi would be unpatriotic, and obviously MAGA is extremely patriotic, in their own warped sense.
A Nazi is the most extreme far right ideologue, even more so than a fascist. It's not a word to use lightly and should be reserved for the most utterly insane and extreme far right individuals, very few of which exist in America. Most neo-Nazis exist in northern Europe.