On the one hand the press hound them with cries of "you must be normal, you are not special" etc. etc. On the other hand, if they put one foot out of line (and in this case it was a PRIAVTE party) he gets it in the neck from every corner.
I'm sure that had he really considered his choice of outfit even he would have agreed that it was not sensible. But what's done is done and I don't think he intended it as a direct insult to the memory of people who suffered so horribly at the hands of the Nazis 60 years ago.
How many other people might have gone to parties over the same w/e wearing similar garb. and have not been slated in the press?