Jack says that the planetary convergence demonstrates that someone, presumably God, is "probably looking after things". Jack knows that God is looking after things, since God helped the trio by directly intervening in "The Prophecies".
Cawley says that they killed the Riders for what they seemed to be. As he also notes, the Riders killed the sheriff. It's true that they didn't rape Cynthia as Cynthia claimed, but the Riders also weren't innocent as Cawley makes them out to be.