You discount the large number of praying Christians in this country. America’s sins are not going to stop God from his grace and mercy towards her. If they did stop God, we’d all be lost. The goodness of God leads to repentance.
That is the ONLY reason God has not allowed the natural consequences of what this nation has sown to bring us to absolute ruin.
But it’s coming. God forgives upon repentance, but never takes away the consequences of the sin.
There is not a single Republic in all history that has not committed suicide and allowed by God to fall into ruination.