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.