The only greed the goblins showed was for goblin made items. The goblins were like the Norse dwarves in that regard, being able to make artifact quality items. They viewed such items as belonging to the goblins, even when "sold." They viewed those sales as lasting for the lifetime of the purchaser and were highly offended when said items were passed down to other humans rather than returned. There was nothing Jewish about their greed or scheming, which was only for the one goblin item in the books/movie, the Sword of Gryffindor, which if it wasn't Excalibur, was a sword very much like it. As for the gold of others, they defended it with much integrity and risk to their own lives. There was no antisemitism that I saw.