That's why Jesus made it a personal relationship - it doesn't matter what those around us do; we can still attain eternal life with Him despite what our governments do. If God were to decide to destroy our Nation (which I don't believe He will do under the New Covenant) it will not matter to my future in Eternity.
While we tend to get caught up in the "we as a Nation" deal, it is not really crucial in our relationship with God - carry the Word and try to be a faithful witness to His Love and Grace. The world will keep degenerating into a cesspool and we cannot stop it. Else, he would not have to come back to redeem us all from Evil.
God is good and faithful - always. He will prevail. He owns my soul and will not relinquish it!
Those who are Christians are under the new covenant...those who aren’t remain condemned under the old covenant... read Hebrews...Mount Zion for the saved vs Mount Sinai for the wicked.