Isn't the tune for "Plastic Jesus" the same for "Oklahoma Hills"? I dunno it's been a while since I've heard it. If I remember correctly in "The Incompleat Folksinger" Pete Seeger mentions that he liked the song a lot because of it's pointing to how people accept plastic or illusion over substance but he said he decided not to sing the song anymore because he also saw that the reason he enjoyed it might have something to do with his protestant upbringing. He mentioned a Catholic friend who said the image of Jesus should be thought of in the same lines as a picture of a loved one that people keep in a wallet.