Sorry but there is an assumption implicit in your argument that tyrants like Hitler are somehow not human and are exceptional and not really a part of humanity. Well, they are.

There is this quote that I absolutely love

"No tyrant could thrive where every subject said no. The tyrant thrives when the first fucking fool salutes." -Steven Erikson.

I repeat, it is really shameful of us that we are far too often the fools to salute.