Wait, I'm confused. I thought the Lord ordered people to kill innocent children who had nothing to do with someone else's transgressions?

"Thus says the Lord of hosts, ‘I have noted what Amalek did to Israel in opposing them on the way when they came up out of Egypt. Now go and strike Amalek and devote to destruction all that they have. Do not spare them, but kill both man and woman, child and infant, ox and sheep, camel and donkey.’” - 1 Samuel 15:2-3 ESV

Why wouldn't the Lord just punish people individually according to their sins instead of aborting little kids who had nothing to do with the transgression? Is it the same reason Rayel aborted these innocent little kids with his chastisement? https://www.dailymail.co.uk/news/article-4830886/Family-6-die-van-swept-away-Hurricane-Harvey.html

Is it moral, just, and righteous to murder some innocent kid for someone else's crime? Is God moral, just, and righteous? Can Rayel therefore be God?