I will give you some context here - in my high school (India) we were never taught any of the million horrible things Hitler did to people. We were only taught that Hitler was a very prominent leader and an icon of history that always won wars and held Germany and many other countries in his grip. It was only when I read about him on the internet that I found what kind of an SOB he actually was, many years later.
I was so stoned by all of that and the fact that our education and schooling hid that very fact from all of us. So it is up to us to teach kids when they grow up to allow them to know history as it exactly happened, without painting it, when the time is right.