A surprising divine comparison emerges between the divided kingdoms of Israel and Judah. God determines that despite the deep flaws of the northern kingdom of Israel, her spiritual state and overall guilt are actually less severe than those of her southern sister, Judah. Israel is viewed as having cleared herself from judgment, appearing almost righteous when measured against her southern neighbor [רש״י, ביאור שטיינזלץ].
Commentators offer several ways to understand why a rebellious Israel is viewed more favorably than a treacherous Judah. One approach focuses on the timeline of their downfall. Because Israel sinned first, she had no prior negative example to learn from or avoid. Consequently, her guilt is considered somewhat lighter [רש״י].
Another perspective shifts the focus from the timeline to the sheer severity of the actions committed. Even though Israel initiated the cycle of sin, Judah escalated her wrongdoing to such an extreme degree that Israel looks righteous in comparison [מצודת דוד, רד״ק]. Judah's escalating sins involved a direct and bold disgrace of God's House in Jerusalem. This included bringing idols and statues directly into the Temple, halting the sacrificial service, and extinguishing the sacred lamps, as occurred during the days of King Ahaz. Additionally, during the era of Manasseh, Judah embraced terrible abominations such as passing children through fire, practicing witchcraft, and ruthlessly shedding innocent blood until Jerusalem was filled with the dead [רד״ק].
Beyond the specific actions, the very nature of their betrayal differed. While Israel sinned with open arrogance and public defiance, Judah added a deep layer of hypocrisy to her actions. This hidden deceit ultimately magnified the severity of Judah's betrayal, making her spiritual failure far worse than Israel's [ביאור שטיינזלץ].