(Devarim, Ibid.) "They sacrificed to demons, which availed naught": If they served the sun, the moon, the stars, the constellations — things which are of need and benefit to the world, His anger would not be "doubled," (as it is now), but they serve others which are of no benefit to them, but are detrimental to them. "to demons" (sheidim): a shed enters a man and overmasters him.
"gods they had not known": the nations did not know them. "new ones, newly come': Whenever a gentile saw it he would say "This is a Jewish image." As it is written (Isaiah 10:10) "Just as my hand has overpowered the kingdoms of the false god — and their graven images are from Jerusalem and Shomron" — whereby we are taught that Jerusalem and Shomron would supply moulds (for images) to all comers.