There was a ton of people a while back calling Larry David, the second jewiest jew behind Mel Brooks, anti-Semitic because of one of his jokes. And Milo Yianapolis, a gay man who exclusively bands big black men, is also a "literal nazi." Because Nazis were well known for their leniency on homosexuality and interracial dating policies.
These people, I suspect, don't ACTUALLY know what a real Nazi even was. They just know it's the universally accepted bad guys, and will call anyone and everyone they don't like a nazi.