He was a retired teacher and tried to get them to agree to at least some basic scientific principles. Once he got them there...

"Never mind the current crop of sinners! What about the Neanderthals? Those poor people didn't even know yet they were doing anything wrong! How can you say they're excluded?!"

His favorite was the walls of Jericho. "The only way to get an extra hour of sunlight is to stop the rotation of the Earth. Right?!" "Uhh? Yes...?". "Well then, no wonder the walls came down. Those poor saps in the front lines smacked into it at 900 mph*!" By that time, usually the white flag came out and it was off to save more souls...

* 1500 km/h. Hard conversion :-)