“If you took away the names of these Nazis, and just sat down to talk to them, they were like your friends and neighbours.”

"No. We didn’t find anything abnormal, nothing to indicate something that would make them the murderers they would become. In fact, they were all quite normal. Evil and extreme cruelty can go with normality."

http://www.bbcwordblog.com/jewish-us-army-translator-who-got-close-to-the-nazis.html