Many Christians believe Jesus' death on the cross was the ultimate act of love - however, if Jesus is God, and Jesus died in order to take on the sins of the world so he could pay the "wage of sin" ... that means God paid himself. Which is the equivalent of taking money from one pocket and moving it to another. Nothing is gained from the action. You still have just as much money as you did before you started. The action is COMPLETELY USELESS.
This argument from Christians makes Jesus' death into a useless act that accomplished nothing.