Why is it strange that it happened in NJ?
I thought NJ was more progressive on the whole gay marriage thing. You'd think this would happen in the Midwest or in the South. Can't imagine some Yankee dress store owner telling a woman who came into her shop to buy an expensive dress, "You're an embarrassment," and to make a scene out of it.
It was also pretty stupid for the dress owner to say that the wedding was "illegal" and that they wouldn't support illegal activities.
There's nothing illegal about a gay wedding. People can get together and have any type of ceremony that they want; buy rings, dresses, wedding cakes, whatever. The issue has always been state endorsement of the marriage and the peripheral legal benefits, not the ceremony.