Anger+over+Rose+of+Sharon's+Dead+Baby

How do Uncle John's angry words as he deals with Rose of Sharon's dead baby perhaps reflect Steinbeck's own anger? Uncle John at first doesn't want to deal with the dead baby. He says no, and why should I have to deal with it? and then very reluctantly agrees and takes the baby and the apple crate to dispose of it in the torrents of water that flow by the box cars. John walks onto the highway and delivers the baby into the stream and says "Go down and tell 'em. Go down in the street an' rot an' tell 'em that way". this moment in the book is most likely a reference to the biblical figure moses who is sent down the Nile River in a basket to have a chance at survival. I think it reflects Steinbeck's own anger by him saying in his novel that people needed to be reminded of the hardships of the migrant workers.