God be praised for Obadiah's brevity!
1:1 ...Thus saith the Lord GOD concerning Edom; We have heard a rumour from the LORD, and an ambassador is sent among the heathen, Arise ye, and let us rise up against her in battle.
George W Bush and friends started the Iraq war for the same reason. If a rumor is good enough for God... ;-)
God is still in the revenge game.
15 For the day of the LORD is near upon all the heathen: as thou hast done, it shall be done unto thee: thy reward shall return upon thine own head.
Otherwise, the same fire, destruction and invasion we're used to.