His love endures forever (Psalm 136)

This is a praise song. God is praised for various aspects of creation or deliverance of the people of Israel. After each praise, there is a refrain of "His love endures forever.". For me, it is easier to see the connection of enduring love where creation is discussed as opposed to where King Og of Bashan is struck down (v. 20). But I suppose if God struck down Hitler, we would might say in praise "His love endures forever."