This warning to the nations is very easy to understand.  God is a jealous God.  He is jealous for His reputation as the only God.  And He is jealous for His land and people Israel.

Zephaniah 3:8

So wait for me to come as judge,”
    announces the Lord.
“Wait for the day I will stand up
    to witness against all sinners.
I have decided to gather the nations.
    I will bring the kingdoms together.
And I will pour out all of my burning anger on them.
    The fire of my jealous anger
    will burn the whole world up

PRAY FOR YOUR NATION TO REPENT FOR THE WORSHIP OF FALSE GODS AND ITS TREATMENT OF ISRAEL.