An extended condemnation of the king who he calls Shallum here.
He was essentially a puppet king for Egypt, and sold out Israel’s wealth to them. He was in the wrong side of history, as the Babylonians defeated Egypt.
Yes, he sold out to losers; wup wah.
He was the third last king before everything was destroyed. The last two were Babylonian puppets.
Personality wise he was a capricious murderer who had multiple incestuous relationships.
So the extreme condemnation from Jeremiah is not surprising.
There is a poignant portrait of what a good king looks like at the start of the chapter:
“Do justice and righteousness, and deliver from the hand of the oppressor him who has been robbed. And do no wrong or violence to the resident alien, the fatherless, and the widow, nor shed innocent blood in this place.”
Care for the vulnerable, righting wrongs, avoiding innocent bloodshed. This is the purpose of power.
With the world in a political cycle that favours demagogues, these words are comfort indeed. As are the ones that follow, promising that the bad stuff will pass.