What lessons does the Holocaust have for us today?

One madman, despite how attractive (Hitler was considered to be sexy) or politic savy (He had the uncanny ability to dupe millions with his eloquent speech) he or she is, can wipe out 6 million innocent people and traumatize millions upon millions more. Also, the worst kind of dictator is the kind that can hypnotize and brainwash his country to do whatever he wants them to do. Lastly, the way in which he went about getting into office is the same way that politicians are doing it today. Hitler gathered up all of the registered guns from everyone, and then went to town on whoever he deemed scum, which in this case, was the Jews. A gunless people is a defenseless people, for the criminals keep theirs, and Hitler knew that, for he was as sly as a conman. Adolf's method was to replace the Jews with his Aryan race of blue eyed blondes, his idyllic society. Thankfully, his dreams went down the tubes thanks to the Allies, and a single cyanide pill.