No one is trying to erase the atrocities of Nazi Germany and the murder of millions of Jews and others. Germany has faced their guilt in a open and responsible manner. For you to say that every German was a Nazi and every German is guilty offends me. 
Do you believe the entire American nation backs Trump? Or Bush' illegal war in Iraq? Are all Americans responsible for the millions who have sufffered and died due to our destabilizing of the Mid East? Are we all responsible for the horror of slavery or the genocide of Native Americans? The Governments of Communist China and the Soviet Union killed tens of millions of their own people. Are all Russians and Chinese to blame for this? Has Russia, China or any other country that has committed genocide been as forthright and honest about their guilt? 
Stereotyping and condemning an entire nation or an entire religion or an entire race because of the actions of a few, or the crimes of their leaders is wrong. I'm sorry you don't understand this