"What guidelines do we have to determine when a culture is irredeemable, beyond the point of no moral and spiritual return? Don’t we need something more than mere mortals to assess a culture’s ripeness for judgment? Aren’t these considerations too weighty for humans to judge? Yes, they are! Any such determinations should be left up to God—namely, through special revelation. The Israelites, when they went into battle against the Philistines
with the ark of the covenant but
without divine approval, were roundly defeated (1 Sam. 4). The requirement of special revelation before any such undertaking is precisely what we have in Scripture. The one true God told his prophet Moses or Samuel when the time was right. Likewise, without such clear divine guidance, Israel
wouldn’t have been justified in attacking the Canaanite strongholds."
Copan, Paul. Is God a Moral Monster?: Making Sense of the Old Testament God (p. 161). Baker Publishing Group. Kindle Edition.
Did he correct it or bring the point of it to light? The Law focused on outward actions but Jesus points out that sin is actually a heart issue:
Mat 15:18 "But what comes out of the mouth proceeds from the heart, and this defiles a person.
Mat 15:19 For out of the heart come evil thoughts, murder, adultery, sexual immorality, theft, false witness, slander.
Mat 15:20 These are what defile a person. But to eat with unwashed hands does not defile anyone.” (ESV)
Hence:
Mat 5:21 “You have heard that it was said to those of old, ‘You shall not murder; and whoever murders will be liable to judgment.’
Mat 5:22 But I say to you that everyone who is angry with his brother will be liable to judgment; whoever insults his brother will be liable to the council; and whoever says, ‘You fool!’ will be liable to the hell of fire.
...
Mat 5:27 “You have heard that it was said, ‘You shall not commit adultery.’
Mat 5:28 But I say to you that everyone who looks at a woman with lustful intent has already committed adultery with her in his heart. (ESV)
And some more:
"Yale theologian Miroslav Volf was born in Croatia and lived through the nightmare years of ethnic strife in the former Yugoslavia that included the destruction of churches, the raping of women, and the murdering of innocents. He once thought that wrath and anger were beneath God, but he came to realize that his view of God had been too low. Here Volf puts the New Atheists’ complaints about divine wrath into proper perspective:
I used to think that wrath was unworthy of God. Isn’t God love? Shouldn’t divine love be beyond wrath? God is love, and God loves every person and every creature. That’s exactly why God is wrathful against some of them. My last resistance to the idea of God’s wrath was a casualty of the war in the former Yugoslavia, the region from which I come. According to some estimates, 200,000 people were killed and over 3,000,000 were displaced. My villages and cities were destroyed, my people shelled day in and day out, some of them brutalized beyond imagination, and I could not imagine God not being angry. Or think of Rwanda in the last decade of the past century, where 800,000 people were hacked to death in one hundred days! How did God react to the carnage? By doting on the perpetrators in a grandfatherly fashion? By refusing to condemn the bloodbath but instead affirming the perpetrators’ basic goodness? Wasn’t God fiercely angry with them? Though I used to complain about the indecency of the idea of God’s wrath, I came to think that I would have to rebel against a God who wasn’t wrathful at the sight of the world’s evil. God isn’t wrathful in spite of being love. God is wrathful because God is love."
Copan, Paul. Is God a Moral Monster?: Making Sense of the Old Testament God (p. 192). Baker Publishing Group. Kindle Edition.
"In one of his earlier and most important writings, written in German under the title
Rechtfertigen and translated to English under the title
Justification, Dr. Küng deals with this very question of the seeming injustice of God’s wrath that we find in Scripture, particularly in the Old Testament. He makes the point that the real mystery of iniquity, the real puzzle is not that a holy and righteous God should exercise justice. What is mysterious about a holy creator punishing willfully disobedient creatures? The real mystery is why God, through generation after generation, tolerates rebellious creatures who commit cosmic treason against His authority."
https://www.ligonier.org/learn/series/holiness-of-god/holiness-and-justice
There is no difference between God in the OT and God in the NT. All mankind faces his wrath for their continual sin and failure to acknowledge him as God even though they know better (Rom 1:18-21). At all times God has been more than patient, certainly significantly more than humans deserve.