1. Lament over the Destruction of Jerusalem that is over our soul on account of its fall into sin and losing its peaceful state. Jerusalem means vision of peace. Rivers of Babylon are the passionate thoughts, because they are the cause of confusion (=Babylon). So remembering our former dispassionate state of soul (Zion), what else can we do but weep.
(skipping the other verses for lack of time - I’m sure you can figure it out)
7. Edomites are the fleshly thoughts that entice the soul to purse sinful pleasures and which are the cause of its destruction. Daughter of Babylon is the soul, which has been defeated in her thoughts by sin, whereas her little ones are the first actions of sin. However, you Donna Rose being a wise lady, you will not let them grow and become men (serious sins), but you will crush them with the prayer of Jesus, which is the Rock.