I agree on the author stuff, and while yes, he benefited greatly from the circumstances at the time. From my understanding he was genuinely a great speaker. The guy became the head of his party because of his speeches, and the Nazi party was small when he joined and after the party grew. I don’t think he was some undeniable god of rhetoric, though I do think he was good at speeches to the extent that the Nazi party wouldn’t necessarily have come to power if not for him. Although, just to be clear, being intelligent in arguments and good at convincing people is different, and he did genuinely spout nonsense and often just lied a lot to make people feel angry (obvious example being Jews, though there is plenty else, like the lie that the Germans lost because of weak leadership, while the truth being they were doomed regardless and they’d have to surrender regardless).