Lets get one thing straight. The Allies didn't go to war because of holocaust, they were dragged into a conflict by Hitler. In fact the only reason why the UK went to war against Hitler at the time was because Winston Churchill was determined to have another war because he was a drunken psychopath. Many of the newspapers at the time actually were against allowing Jewish Refugees into the UK. Also in the US the Nazis were popular enough that Coke Cola had adverts with the swastika on it.