“Judah has been faithless.

An abomination

Has been committed

In Israel,

As well as in Jerusalem.

Judah has profaned

The sanctuary of Yahweh

That he loves.

He has married

The daughter of a foreign god.

May Yahweh cut off

From the tents of Jacob

Anyone who does this!

May Yahweh cut off

Anyone who witnesses,

Who answers,

Who brings an offering

To Yahweh of hosts!”

Yahweh, via Malachi, noted that Judah had not been faithful.  There was an abomination in Jerusalem itself.  Judah had profaned the sanctuary of Yahweh.  Judah had married the daughter of a foreign god.  Perhaps this indicates a non-Jewish woman.  Thus, Yahweh was going to cut them off from the tents of Jacob.  Anyone involved in any kind of false worship of a foreign god would be cut off from being a witness or bringing offerings to Yahweh.  They should be excommunicated.