Kullervo is clearly a supernatural figure, not an ordinary orphan. How else could a boy have the strengh to beat a net back to tow (linen fibers) and all the fish in the water into jelly?

Perhaps in the Kalevala, as in Shakespeare's Tempest, the magical beings are bereft of human emotions such as compassion, love, and guilt. That may be why he revenges the stone in the bread so savagely.

Attn pedents: maybe 'revenge' has never been a transitive verb before. It is now.