Imagine a conversation in a household during this season. A husband asks his wife: “Must we go to the holiday concert at school tonight? You know how much I dislike Christmas songs.” The wife pauses. Then she asks, “’Must?’ As in, is there a law? A state statute requiring parents to attend school concerts?” “Well…no,” he says. “That’s not what I meant.” “Then,” she says, her voice sharpening just a bit, “we must go. Because we love our daughter. And she is singing in the concert.” End of conversation. We replay this exchange all the time, whether we notice it or not. Must a mother go to her child’s soccer game? Must we attend that birthday party? Must a wife get her husband a birthday gift?          There are no laws that make any of these things necessary. So, why do we do them? Because the relationship creates the obligation. That is one of the most important questions facing Jews today — why do Jewish? That came up in my recent conversation (and podcast) with …