Adolf Was Normal
I think that it is important for students to learn about the more mundane aspects of Adolf Hitler and his life because those minuscule details can be a lesson in themselves. I definitely agree with some of the points @purplenailpolish00 and @yelloworchids made. Those who are studying the Holocaust need not spend too much time on Hitler, as it would detract from the survivors' stories, but understanding him to some degree is key. The fact that Hitler cared for his body, maintained a spectacular home, and was kind to his young neighbors should be no surprise. Oftentimes as human beings we think we're judging someone based on their character, but we are still making conclusions based on appearances. Appearances aren't limited to mere looks, but are also the positive things we attribute to one's personhood.
For example, a thief could live right next door to any one of us without us knowing. They could keep a stringent wake-up routine, garden the flowers, and say hello every time we pass by. These positive qualities would cause many of us to say, ''Wow, what a pleasant, diligent, and caring individual! Maybe I should invite them over for dinner sometime.'' Let's say we did invite them over to eat, and they kept a lively conversation. This would make it even harder for us to think of them as evil, cunning, or even suspect in any way.
It's difficult for human beings to closely associate with negative traits. This is why many of us need a ''sandwich'' model when we receive negative feedback in order to save our egos. Consciously or subconsciously, we see our neighborhoods as indirect mirrors of our own lives and personalities. ''If so-and-so is bad, then I can be malicious as well.'' We don't want to see ourselves as bad, and in extension, our neighbors as suspect. We also strive to not come off as judge-y, even in our own minds, so even if a person hinted at theft with their actions we'd quickly dismiss it.
People are fascinated by Hitler's life because deep down they're wondering, ''could he have been my neighbor?'' ''Would I have caught him veering off and said something?'' They want to know if their moral compass would've been strong enough to stop him. The bottom line is yes, Hitler could've been your neighbor, and maybe you would've been strong enough to stop him. However, it's quite likely you wouldn't have been able to since what you would've been seeing was an eccentric, sophisticated man who raised the community's property values. 9/10 it's microcosm over macrocosm for people. People should know that Hitler was a rabid racist who fueled fear, and also loved casual strolls on the beach.