The US intelligence community and the Presidential cabinet knew about the persecution of the Jews from Jews in the countries and those that came to the US to escape from the Nazi Germans. They did lack the knowledge of the extent of killings of the Jews and all their methods of killing the Jews. The Allied Forces got the full understanding of the Holocaust when they found the concentration camps.
The public was told about the killing of the Jews by newspapermen and magazine reporters but the general public refused to believe it. After the war they regretted their ignorance of the seriousness of the Nazi oppression and regretted their isolationist attitudes prior to the entry of the UK and USA in the war.
their attitudes were different before, during and after
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They where persecution by Hitlers solders
Most of the scenes with Jews in showed persecution of Jews.
The people responsible for the persecution were removed from places of power that enabled them to commint the persecution.
Persecution forced the Jews to migrate to new regions.
The persecution (systematic harassment by the government) of the Jews in Nazi Germany very soon after the Nazis came to power in 1933. Please see the related question for details. Moreover, if Jews were beaten up by Nazi stormtroopers the police did nothing to protect them.
The majority of the persecution of the Jews by Antiochus Epiphanes took place in the area around Jerusalem. This persecution led directly to the Maccabean Revolt.
Hitler!
Always.
I don't think the Nazi persecution of the Jews had any bearing on the '''outcome''' of World War 2. The war (unlike the Holocaust) was not about the Jews.
prohibiting marrige between jews and non- jews