Post #1 Week #3 American Nazis

When Billy is a P.O.W. in Dresden he and the other American soldiers are visited by "Howard W. Campbell, Jr., an American who had become a Nazi" (Vonnegut, 162). This surprised me because I didn't think that a previous American soldier would want to become a Nazi after they went to war to fight them. I also didn't know that this was happening during WWII. What do you think caused soldiers to switch to the side of the Nazis?