If the skinhead is behaving in a civil manner then I believe that he should serve him. It is unlikely though that a skinhead would go dine and support a jewish restaurant though. Ghandi once said, "You need to be the change you wish to see in the world".
And if he knew you were using that quote in this context....
You do know that Ghandi was a friend of Hitler, yes?
As a racist I try to avoid jewish and immigrant establishments whenever possible. Long time ago I entered jewish restaurant and asked for pig steak. Surprisingly me and my friends were kindly offered alternate kosher foods. I was dressed in black shirt with runes and black beret, cammo pants and paratrooper boots so the waitress could not mistake us for ordinary customers.
Sounds like a scene from The Beliver:
http://www.imdb.com/title/tt0247199/?ref_=fn_al_tt_1a movie that can be enjoyed by both nazis and jews alike.
