What is the meaning of Psalm 137 verse 9, which mentions dashing infants against rocks?

Psalm 137:9 is a verse that expresses the deep pain and anger of the Israelites who were exiled from their homeland. It is a metaphorical expression of the intense emotions felt by the people at that time, rather than a literal call to violence. The verse reflects the anguish and desire for justice felt by the Israelites in the face of their suffering and loss.