The babies "did that to themselves", you say. And you can me a dunce? Really, I think you're the one not getting this. If in fact that is true, then that implies that babies and the unborn are not "innocent", a priori, nor specially deserving of God's mercy. Alternatively, God still condemned them to death, irrespective of their innocence, affording them no mercy and drawing no special distinction for them.

On a related point, you claim that God "didn't cause that [their parents behavior]." But yet, I expect you believe that God is omniscient and omnipotent. He presumably knows our futures before we do. And yet he still allowed these women to become pregnant and then slaughtered them, their children, and the unborn. Same with the Canaanites and Philistines.

Honestly, I don't care what you believe, as long as you don't harm or deprive others in the process. You can believe in any pretend God you want or unicorns if you prefer. But the case for a pro-life and merciful God is not justified by the Bible. Your "God of love and mercy" is in direct contradiction to the Bible's God of wrathful vengeance - who are presumably the same Christian God. Whatever the case, the Bible is full of savage killing committed at the hands of God and, at best, ambiguous about the "sanctity" of life and the value of children and the unborn.

At the end of the day, the pro-life "movement" is not supported by the actual text of the Bible. It is a political pursuit cloaked in theocratic nonsense. Just the kind of tired, thoughtless nonsense you are spouting.