"Dumb" isn't the word I'd use; "incurious" is better. It's not that he's racist or antisemitic, I believe, but rather he doesn't have enough knowledge of histor

"Dumb" isn't the word I'd use; "incurious" is better. It's not that he's racist or antisemitic, I believe, but rather he doesn't have enough knowledge of history to recognize classic antisemitic tropes (or signs that someone is an outright Nazi) combined with some beliefs close enough to racist that he's liable to agree with antisemitic creeds without recognizing them as antisemitic tropes.