Anyone with a biblical worldview should realize that this may be exeactly what the Lord intends. No, we were never a “Christian Country” under a covenant with God as ancient Israel was. But it’s also true, as the Psalmist said, that “righteousness exalts a nation.” This country was once exalted. It founded by people with a concept of God’s morality and will. Now we’re a country that institutionalizes child sacrifice, homosexuality, and injustice. His patience is not infinite. We can vote and speak up, but He is giving us exactly the leaders He wants, for His pupose. And that might be to bring down America, or it might be to make it less self-reliant and urge it to repent. We’ll see.
Even an atheist should agree with what you said. Without some kind of moral compass, this country would never have won it’s independence. And where did they find that moral compass? From their deep belief in Divine Providence. Had they all been atheists, they would have felt they were on their own and they would have been crushed.