They looked so normal, having fun, teasing each other, drinking and playing instruments.
There is even a video where hitler is shying away from his love companion.
This was a shock to me as a kid: evil doesn't look like the caricature of "the very bad guy", it emerges in every day people.
I think we failed to communicate that. It was too tempting to have a universal vilain you could use in Hollywood movies and instantly recognize. That you can't identify to. Black and white is so easy to sell.
But what it means is a huge part of our society cannot make the link between what is happening in their own life and the past. Because they have a vision of the past that looks like a kid show, not what really happened.
Worse, on the other side, outraged people abused the term nazi to call out anybody that had a bad behavior. But there is a huge difference between being an asshole and being ready to commit genocide.
Eventually it means the word nazi lost all of its meaning. And all of its usefulness to defend ourselves.
In the last too decades, we surely spent a lot of time playing with words until they could not be useful anymore. But it made us feel good for a moment.