Amaziah worshipping weak gods.

I was reading in 2 Chronicles 25 this morning about King Amaziah of Judah. He led his people into battle and killed 20,000 people of Seir (verses 11-12). He then "brought the gods of the people of Seir, set them up to be his gods, and bowed down before them and burned incense to them. Therefore the anger of the Lord was arouused against Amaziah, and He sent him a prophet who said to him, 'Why have you sought the gods of the peoople, which could not rescue their own people from your hand?'" (verses 14-15). If it weren't for the anger of God, this would be very comical. Think about it, Amaziah defeated the people of Seir, which means "their gods" (which were not gods at all) were not able to protect them. But then Amaziah takes these gods and he worships them! He worships the gods that were not strong enough to defeat him! He is worshipping that which has been proven to be weaker than himself!