What is wrong with everyone on this thread!?
ALL adults in this country (no matter how stupid) realise that the nazis were bad and killed millions of people. Harry as royalty will have been taught privately all about history, including the history of his family. He KNEW what he was doing - this is no honest mistake.
The news showed an old man who had spent 22 months in captivity by the nazis....he was upset about this naturally because Harry represents the monarchy of our country. The man related how he'd seen nazis making women throw their own children onto fires.
Harry should be ashamed. As a member of the royal family HE SHOULD KNOW BETTER. As for anyone else wearing that outfit, that is up to them if they're going to a private party. But as for those raised to be in such a responsible and public position, I don't think it is appropriate.