You are absolutely correct. Not only the USA but many other nations as well.
The sad thing is that the modern church has allowed the standards of the world, the humanist philosphy to creep into the church. The church's refusal to call sin by its rightful name hinder the church in its witness to the nation. I believe that the church has lost its vision. The church has become weak morally so the nation will become weak morally too. A nation that has forsaken God can only look forward to judgement and destruction.
I'm sure you're right, but I could only speak to what I know, and that's the country I live in. But I also know the Church, and it seems like we're becoming more like Corinth year by year:
"It is actually reported that there is sexual immorality among you, and such sexual immorality as is not even named among the Gentiles--that a man has his father's wife! And you are puffed up, and have not rather mourned, that he who has done this deed might be taken away from among you." (1 Cor. 5:1-2)
Instead of speaking out against unrighteousness, we wink at it, accept it, and even pride ourselves on being inclusive. Jesus said we are the salt of the earth; "
but if the salt loses its flavor, how shall it be seasoned? It is then good for nothing but to be thrown out and trampled underfoot by men."
(Matt. 5:13)
And just as judgment is due on the Church, so too is judgment due on the nation:
"For since the creation of the world His invisible attributes are clearly seen, being understood by the things that are made, even His eternal power and Godhead, so that they are without excuse, because, although they knew God, they did not glorify Him as God, nor were thankful, but became futile in their thoughts, and their foolish hearts were darkened. Professing to be wise, they became fools, and changed the glory of the incorruptible God into an image made like corruptible man--and birds and four-footed animals and creeping things." (Rom. 1:20-23)
"And even as they did not like to retain God in their knowledge, God gave them over to a debased mind, to do those things which are not fitting; being filled with all unrighteousness, sexual immorality, wickedness, covetousness, maliciousness; full of envy, murder, strife, deceit, evil-mindedness; they are whisperers, backbiters, haters of God, violent, proud, boasters, inventors of evil things, disobedient to parents, undiscerning, untrustworthy, unloving, unforgiving, unmerciful; who, knowing the righteous judgment of God, that those who practice such things are deserving of death, not only do the same but also approve of those who practice them." (Rom. 1:28-32)
Things aren't looking good :-(