Who can save US from the infidels of Christmas commodity? Look no further, tired shopper, for your hero arrives as the diligent songwriter Sufjan Stevens, army of one, banjo in one hand, drum machine in the other, holed up in his room, surrounded by hymnals, oratorios, music charts, sacred harp books, paper-clipped-photo-copied Readers Digest Christmas catalog singing his barbaric yawp above the snow-capped rooftops.