Jeremiah gets quite specific in his prophecy.
Babylon will conquer and exile Israel for 70, but then be conquered herself.
God will silence the joyful sounds in Israel, and make the nations drink the cup of His wrath.
It'll be like a lion roaring and leaving no refuge for shepherds or sheep.
Baruch complains, and God rebukes him: I'm destroying the whole land and you expect great things for yourself? Don't! But I'll give you your life through all the warfare coming.
To Egypt: God is sending Babylon to conquer you.
To Israel: Don't be afraid. I'll punish you, but restore you to peace and safety.
He had assistants who sought great things for themselves, too (James, John, Judas, at least).
We are like Baruch, seeking to save our own skins when we hear of geo-political shake-ups, or God bringing down nations. God warns us against this. Even when He brings sweeping changes, His eye is on His people, that they not fear, but be purified and at peace.
Jacob shall return and have quiet and ease,
and none shall make him afraid.
Fear not, O Jacob my servant,
declares the Lord,
for I am with you.