Or by a lesser god. The glaring error in our establishment is that our founders did not see fit to specifically name the God from whom our rights derive. I have long seen that as its eventual undoing.
God fouls the plans of nations, as the Psalms note repeatedly. Remember that.
Any nation that claims to follow God invariably is corrupted within a few generations. It does not matter what God that is. Rome flipped to Christianity in the fourth century, and 100 years later, it fell to heathens. Israel, God's chosen people, fell away, having been cursed with corrupt rulers from their first king Saul, and were driven into exile. The British Empire claimed its own church, persecuting other Christian sects.
No man can live by the standards of God on Earth. Nor do most even want to do so, as lust for sinful pleasure is far more appealing.