Bernie is not a populist. He addresses actual issues affecting many Americans. But he does so with properly thought out solutions and arguments. The Democrats labelling it as populism to care about people is part of why they lost in 2016 and now lost harder in 2024.
Trump is a populist. He makes simple statements of simple messages, suggesting simple solutions, even though most of it are lies or wouldnt work.
Mein Kampf was dictated by Hitler to his personal assistant, who wrote it down for him. In the German original many sentences are shortened to ",..." Because the writer couldnt put it down as fast as Hitler was rambling.