The justification for this pointing to the Bible is right on target for christian theocrats.

As a kid in Bible class, I asked several times over the years, in one way or another, why it was ok for God to order killing everyone but when we do war today, killing civilians is a bad thing.

One time, the male teacher arrogantly engaged with me (most teachers were women before that who dismissed me), thinking I was being sarcastic; I wasn’t. To clarify, I asked, “Was God wrong to kill them all, or are we wrong today to let them live?” I was told to leave the class after not budging. It didn’t make sense to me that both positions could be morally righteous.

This is misleading.

What they actually mean is “I want as many dead kids as possible”