The point is that if there is no God, then objective right and wrong do not exist. As Dostoyevsky said, “All things are permitted.
William Lane CraigRichard [Carrier] takes the extremist position that Jesus of Nazareth never even existed, that there was no such person in history. This is a position that is so extreme that to call it marginal would be an understatement; it doesn't even appear on the map of contemporary New Testament scholarship.
William Lane CraigTherefore, when a person refuses to come to Christ it is never just because of lack of evidence or because of intellectual difficulties: at root, he refuses to come because he willingly ignores and rejects the drawing of God's Spirit on his heart. No one in the final analysis really fails to become a Christian because of lack of arguments; he fails to become a Christian because he loves darkness rather than light and wants nothing to do with God.
William Lane CraigAtheists themselves used to be very comfortable in maintaining that the universe is eternal and uncaused. The problem is that they can no longer hold that position because modern evidence that the universe started with the Big Bang. So they can't legitimately object when I make the same claim about God - he is eternal and he is uncaused.
William Lane Craig