War is hell! War is violence. It can’t be romanticized or glamourized; there is no two ways about it. War kills people, breaks things, and causes years of untold trauma. Spiritual warfare is the same. Killing babies is an act of total warfare (to prevent a rising of the next generation). Spiritually, little sins grow up to be killer sins; so stop it now. The Sin and Death Enemies (called Edom and Babylon) must be violently overthrown. The most violent overthrow and total destruction was the resurrection of Jesus Christ. It was violence to our enemies and it was hell for them.
The heartfelt passion that the Exiles felt toward enemies was caused by being blocked and removed from the Presence of God in Zion. (They did not yet know that the Presence could be recovered in the Word of God.) This passion drove them to pray a violent curse on the enemies of God. They were too weak to take vengeance into their own hands so they wisely left justice up to the Lord.
We also can ask to feel this kind of violent passion for the presence of God, seek Him with our whole heart, and not be squeamish about hellish spiritual warfare.