To clear the whole Milgram thing up (because I never get to be the informed person in arguments
He tested a selection of local people around where he lived
All subjects went up to 300 (Which they were told was an intense shock)
65% went up to 450 (which they were told would cause death) and the experiment didn't offer any higher shocks, no one said 'no' after 450 because it wasn't possible for them to go any further.
The experiment has been repeated by different psychologists since and the results have been very similar.
All the subjects were prepared to inflict pain on someone else to some extent simply because a person of authority had instructed them to do so. Whether this was the case in Germany I don't know, but it seems this is a trait of people of many different nationalities.