What is new is that this sort of belonging to a group defined by an inherited paternity is shown to be an idolatrous belonging, and by idolatrous, understand a belonging demanding sacrifice. Jesus appears in the midst of such a group and, by showing up its structure for what it is, provokes it into tightening its group frontiers, into acting ever more obviously according to sacrificial type. And the threatening, destabilising element in Jesus' teaching and mode of acting out is that he refuses to concede any divine element at all to inherited group belonging.