One key difference between the faithful kings and the unfaithful kings in the biblical narrative is their adherence to God's commandments and covenant. Faithful kings, such as David and Josiah, sought to follow God's laws, promote worship of Yahweh, and lead their people towards righteousness. They often instituted reforms, removed idols, and encouraged religious observance.
In contrast, unfaithful kings, like Ahab and Manasseh, typically strayed from these commandments, engaged in idolatry, and sometimes encouraged the worship of other deities. Their reigns often led to moral decay, social injustice, and divine judgment upon their kingdoms. This fundamental difference in their spiritual leadership and commitment to God significantly impacted their reigns and the spiritual state of their nations.