Looking for an apologetic to the "Cosmic Child Abuse" objection

Recently during a discussion I got smacked with the "Cosmic Child Abuse" argument. I had heard of it before, but never really had to wrestle with it in real life. I discovered that I don't actually have a satisfactory answer. The situation: Assume Universal salvation for the sake of argument. So God loves everyone, is able to save everyone, is willing to save everyone, and **will** in actual fact save everyone. That's all well and good, but in order to save everyone, the father sent his son to be tortured on a cross and also (for the sake of argument) descend into the deepest depths of Hell and endure further ineffable tortures there too. The problem: Doesn't this compromise both God's love and his justice? How was it loving for God to torture his own son? How was it just/fair for Jesus to take the punishment that we deserve? Scope: I would be happy to hear apologetics from any tradition, seeing as this is a problem which plagues almost all if not all Christian traditions.