Guess what: Not all Nazies were extremists during WWII, but Nazism is still an evil ideology.
During WWII, there were many average German families - husband, wife, kids, etc, - who were just trying to get through the whole mess alive. Only a scant few Germans actually had anything to do with death camps and other attrocities. Even the average army foot soldier was usually just trying to do his bit and not get killed.
So, using your logic, we should befriend the average blue-collar Nazi, as long as they are not the ones actually lynching people or anything, right? Can't blame all Nazis for what Hitler and Himler and Goering did, right?