We saw that here in the Greatest Country in the World as well.
The number of people who would turn on their fellow citizens and willingly ostracize them simply to get along with the regime was shocking.
We know that Stanley Milgram ran his experiments at Yale after the arrest of Adolf Eichmann brought the Holocaust back to the front pages; he wanted to see if enough people could be found here in the US to construct and man death camps similar to how Germany did.
When he was later asked if he thought this country had such people found in it, he was reporter to have said that he could have iund enough people to build and man such a large network without leaving New Haven.