Anne was a young teenage girl who knew very little of life and her aphorism can be correct under certain circumstances and wrong under others. I don't believe you will find out much about GOK under these circumstances (an internet forum). Another lesson you can learn from the Frank family tragedy is that people can be completely irrational about certain things in life. Anne's father was a proud German with little or no Jewish belief. He fought heroically as an officer in the First World War but the Gestapo tracked him down anyway despite the heroic efforts of many Dutch citizens because of a Dutch quisling who betrayed them because they were irrational towards "Jews".