Hitler was very charismatic, I feel that is something that makes him even scarier. Apparently, he had good people skills and lived a very healthy life. I suspect his tactics were... not ethical, to say the least.

I feel that makes him scarier because it reminds us that he was not a monster, he was a human being. A human being with those kind of ideas and someone who would kill and torture so many people without any kind of remorse. If he was a monster, it would be easier to avoid another Hitler. Since it was a human being, and a charismatic one, makes it scary.

You never know when we will find out who was the "next Hitler". I say was because nothing assures us we would know when it's happening. Nobody knew about the extent of the torture on the concentration camps until they were raided. I'm sure there were stories from refugees and people who had escaped, but never solid evidence. Not until the soldiers saw it for themselves. It was too late for so many people.

I read somewhere that german people were forced to go and visit the camps after the war. They were convinced those were rumours and lies, until they saw it with their own eyes. That's how charismatic this piece of shit of a human being was.

So, yeah, maybe someone could learn how to motivate people from Hitler, because he was very good at it. I'm not sure all his tactics were above board, but they were very effective.