Why those events happened? It is a reminder to us from God

Jeremiah 8:1-22
All the bones, kings, officials, priests or people of Jerusalem, will be exposed to the sun and the moon. They will not be gathered up or buried, but will be like refuse lying on the ground.
When men fall down, do they not get up? When a man turns away, does he not return? Why then have these people turned away? why does Jerusalem always turn away? They cling to deceit; they refuse to return.
The stork, dive, swift and thrush observe the time of their migration. But my people do not know the requirement of the Lord.
The wise will be put to shame; they will be dismayed and trapped. Since they have rejected the word of the Lord, what kind of wisdom do they have?
Why are we sitting here? Gather together! Let us flee to the fortified cities and perish there! For the Lord our God has doomed us to perish and given us poisoned water to drink, because we have sinned against him. We hope for peace but no good come, for a time of healing but there was only terror.
Is there no balm in Gilead? Is there no physician there? Why then is there no healing for the wound of my people?
The Lord and prophet asked may "why". These stiff-necked people.
Why?
It is not always clear here whether the speaker is Jeremiah, God or the people.
Jeremiah shares God's own deep grief at his people's sin and its tragic consequences.
Society is sick: sick as a direct result of the nation abandoning god an his law and going their own way. So inevitable has judgment become that the professional mourners can already be called in.
Gilead was famous for its healing ointment from very early times.
How?
Ask myself why? Why those event happened? Many of it has the plan of God, may be is a warning to me, may be is a sign to us, may be is a testimony to us. God is good.