Thanks for the ping!
The fact that the people unquestioningly conducting the child-slaughters at the supposed instruction of their god - a moral lapse that strangely doesn’t even deserve an explanation beyond, “I am this and I can do that!” with no discussion of the significance of bestowing such a quality to that god, destroying its definitional property of perfect justice - but replaced with a secondary scale in order to hide the violation of the first, all shows how man-made the entire enterprise is - and how alike it is to practically any other theological system developed elsewhere on the planet. The consequence of allowing dual scales for “perfect” justice to the divinity of your choice is that it becomes impossible to distinguish from any other god’s reason for existence. Muslims could and actually do justify the vile ways of their god (very much Old Testament-like) by those same lines of illogic - that is how their god behaves, and it can do whatever it wants - including “defy” the realms of logical possibility and do its earliest act and latest act and everything in between, both at the same time, and separately - due to the consequence of removing time from being a factor in that deity’s existence. And they say their god likes its “creation” to be rational.
A particular god wanted David’s child to not exist, but nonetheless “allows” its conception in order that it can be killed later on - for what? As a lesson? The entire “salvation plan” technically rests as crucially on that child having to be snuffed out of existence as it does on any other factor. This is no different from any other man-made barbarism. Free choice in the midst of influencing factors beyond the realms of free will further complicate this arrangement. Our choices, in reality, are influenced by the choices others have made before us.
Thus, when it comes to doing something they seem to know the mind of their god, but when something goes awry, or is clearly nonsensical, then it becomes a divine enigma that is not ours to understand. Conveniently.
The argument here contains a fatal error: its accusation that Biblical doctrine contains moral injustice is dependent on first assuming the Bible is factually wrong.
The phrase “snuffed out of existence” illustrates the assumption of factual wrongness. That is, you must discard the Biblical definition of death, and assume death to be an absolute end.
But within the context of Christian doctrine, the death of David’s child would be followed by ascendance to Heaven, the glory of which would negate any earthly suffering.
So you see, the truth of Biblical doctrine provides its moral justification, even according to human moral standards.