I know you probably know this, but the swastika was widely used in the US as a good-luck symbol before Hitler appropriated it for the Nazis. I have a pre stamped envelope from the US Canal Zone in the 20s with swastikas surrounding the main design.
And while we rightly remember Hitler for the monster he was, he did achieve some of his goals. The Jews were effectively removed from Europe and Britain ceased being a world power. For all of its valiant efforts fighting Hitler, Britain lost its Empire and a great deal of its wealth.