Is it actually just for an innocent person to be punished for someone else's crimes — and if not, how is the cross the foundation of Christianity?
Christianity hinges on the idea that Jesus, who did nothing wrong, absorbed the punishment that belonged to us. But every court in the civilized world calls that injustice. Either substitutionary atonement is the most beautiful act in history — or it's a moral disaster we've been calling 'grace' for two thousand years. Pick a side and defend it.