TThe 1930's photo below is said to show the Duke of Windsor, a British Royal, giving the Nazi salute. What rubbish! Like a lot of elite Brits in the 30s he did see Hitler's achievements in reviving Germany as admirable but what appears below is just a Royal wave. The Nazi salute is straight-armed. It is true that the salute can be given carelessly in a variety of ways that are not straight-armed but that does not prove that this was a Nazi salute. If it did, all sorts of casual waves would have to be regarded as Nazi. Only if the Duke were found to be giving a straight-armed salute could the Nazi accusation stick
UPDATE: A good comment from a reader:
"I agree that the Duke of Windsor is not giving the Nazi salute. If it were a Nazi salute, the Duke would be giving it as a greeting to Der Fuehrer, and if that were so, then all the other Nazis present would be giving it as well. It's just a wave to the crowd."