There is also a group "Sons of Korah" who sing remixes of the Psalms. Including Psalm 137. Which builds up to:

Yes, a reward to the one who grabs your babies and smashes their heads on the rocks!

The Sons of Korah version makes it sound a little better:

Blessed is he who destroys your progeny

Still, it is a recent band singing joyously about genocide. (It is a little better given that the Psalm was written by people at a time when they had just been conquered and the same atrocities done to them, crying out to a power for vengeance.)

They are actually really catchy, and most of their songs (and the Psalms themselves) are reasonably poetic.