I (a Jewish person) draw a distinction between antisemitism and Nazism. Nazis aren't just racist, they're fascist, with a specific set of beliefs. All I can verify is that Disney associated with racists in Hollywood willingly. I find it hard to believe that if Disney was a Nazi sympathizer, he would've produced so many anti-Nazi propaganda films. To give a good analogy, someone might be racist towards Palestinians and Arab people without being Zionist. That's a more specific belief that includes racism.