I learned about this a while back. The point of the experiment was not to show how sadistic people are. The whole point of it is to show how far people are willing to go to respond to authority.
There was a variation of the experiment where the victims of the experiment pushed a button which caused a signal to be sent to an actor who saw the signal then administered the shocks. The people being experimented on never directly shocked the people.
The number of people who proceeded all the way to something like 300 volts shot up.
Let's apply this to Nazi Germany. Hitler tells someone to do this, then that person does this, then that person does this, then that person does this and it takes a while before someone actually dies.
Whenever there is a break in command until the intended action is actually carried out, humans are more capable of doing horrendous things.
Even Eichmann was sickened when he saw the camps. All he had to do to committ mass murder was to shuffle papers and give orders when he was told to by authority and then those orders where than carried out by people who gave even more orders.
The shocking part of the experiment is that many people say, "Fuck that, I would just knock the fucking lights out of an experimenter who told me to do something like that." But you know what? Most people will carry out the experiment even to the very end, few people get up before even starting.
(Btw, I wasn't defending Nazis so please don't flame me.)
