You are correct, naturalized. We find both Grace and Condemnation in both the old and new Testiments. Nineveh found grace because the people of Nineveh repented. Sodom and Gomorrah would have found grace if there had been just 10 righteous souls there.
God is just. God is righteous. God is graceous. God is loving. True throughout the Bible. Even in the books that are left out of the protestant Bibles.
Hallelujah - God is good, and His love endures forever - even through catastrophes that He sends/ allows in His sovereign justice. Not even Job had a right to approach the Throne and demand an accounting of that divine preogative.
Ninevah is the appropriate boundary on the other side. A wicked and adulterous generation looks for the signs and miracles that they believe establish His kingdom, but the only sign God will give them is the sign of Jonah, for in reality, they don’t want to see God’s grace, but His judgment.
The good news is this : God’s wrath is not poured out on those who accept His Son’s name and yield fully to His Spirit. His kingdom is at hand, on earth as it is in heaven. But we who labor in His vineyard must rejoice for those who show up even at the last hour. As for me and my house, we hope the workday lasts as long as the unrepentant walk the earth. My flesh hurries, but my spirit says that His grace will suffice for as long as He deems necessary. He has already said that every knee shall bow and every tongue confess - I get no satisfaction in thinking this only occurs after it is too late for too many.