Sorry to "double up" on you. Many people talk about God judging this country, usually for some laundry list of sins. If we want to take God's judgment on Israel as our example, we first have to realize that the United States is not in covenant with God, and it is certainly not a theocracy. We can learn from Israel's example, but we have to apply that example to our own situation. Second, we have to recognize the principle of corporate solidarity, in that the king often was taken as representing the entirety of the nation. So, with those caveats in place, here's what my own study of the prophets revealed:
Almost always, God's case against the nation came down to a few simple things: 1) Disloyalty to God and his covenant, 2) Corruption of courts and lack of justice, 3) Mistreatment of the poor, the orphan, the widow, and the stranger. Here are two representative passages, Isaiah 58:1-10 and Jeremiah 22:1-5 --
“Cry aloud, spare not;
Lift up your voice like a trumpet;
Tell My people their transgression,
And the house of Jacob their sins.
Yet they seek Me daily,
And delight to know My ways,
As a nation that did righteousness,
And did not forsake the ordinance of their God.
They ask of Me the ordinances of justice;
They take delight in approaching God.
‘Why have we fasted,’ they say, ‘and You have not seen?
Why have we afflicted our souls, and You take no notice?’
“In fact, in the day of your fast you find pleasure,
And exploit all your laborers.
Indeed you fast for strife and debate,
And to strike with the fist of wickedness.
You will not fast as you do this day,
To make your voice heard on high.
Is it a fast that I have chosen,
A day for a man to afflict his soul?
Is it to bow down his head like a bulrush,
And to spread out sackcloth and ashes?
Would you call this a fast,
And an acceptable day to the LORD?
“Is this not the fast that I have chosen:
To loose the bonds of wickedness,
To undo the heavy burdens,
To let the oppressed go free,
And that you break every yoke?
Is it not to share your bread with the hungry,
And that you bring to your house the poor who are cast out;
When you see the naked, that you cover him,
And not hide yourself from your own flesh?
Then your light shall break forth like the morning,
Your healing shall spring forth speedily,
And your righteousness shall go before you;
The glory of the LORD shall be your rear guard.
Then you shall call, and the LORD will answer;
You shall cry, and He will say, ‘Here I am.’
“If you take away the yoke from your midst,
The pointing of the finger, and speaking wickedness,
If you extend your soul to the hungry
And satisfy the afflicted soul,
Then your light shall dawn in the darkness,
And your darkness shall be as the noonday.”
Thus says the Lord: “Go down to the house of the king of Judah, and there speak this word, and say, ‘Hear the word of the Lord, O king of Judah, you who sit on the throne of David, you and your servants and your people who enter these gates! Thus says the Lord: “Execute judgment and righteousness, and deliver the plundered out of the hand of the oppressor. Do no wrong and do no violence to the stranger, the fatherless, or the widow, nor shed innocent blood in this place. For if you indeed do this thing, then shall enter the gates of this house, riding on horses and in chariots, accompanied by servants and people, kings who sit on the throne of David. But if you will not hear these words, I swear by Myself,” says the Lord, “that this house shall become a desolation.”’”
If you notice, the prophets are in agreement with Jesus on this point ... If there is judgment coming our way, it is because of these corporate sins, not because of individual sins.
Edit: Expanded the last sentence a bit