The cup of God's wrath

Jeremiah 25:15-38
The cup of God's wrath gave to all nations, when they drink it, they will stagger(stumble) and go mad(crazy) because of the sword God sent among them. Those nations are from Egypt to all the kingdoms in the face of the earth. And after all of them, the king of Sheshach(Babylon) will drink it too.
Weep and wail, you shepherds; roll in the dust, you leaders of the flock. For your time to be slaughtered has come; you will fall and be shattered like fine pottery.
The shepherd will have nowhere to flee, the leaders of the flock no place to escape. For the Lord is destroying their pasture.
Their land will because desolate because of the sword of the oppressor and because of the Lord's fierce anger.
Why?
The cup of God' wrath is the destroy from the Lord, let them fell and be shattered.
The shepherds and leader of the flock, they should guide the sheep, but they didn't so they will be punished without excuse.
Finally Babylon will be destroyed for their proud and evil deeds.
How?
The anger of the Lord will come in his time to the nations. He is righteous and full of mercy. Waiting for the Lord, and trust in Him.