(Not sure, Daniel, why you reference infants as "guiltless" in a Biblical world that recognizes original sin passed down generation to generation)
Even the Psalmist recognized infants were far from "guiltless" (see Psalm 51:5; 58:3) ...
I've had to take Mormons to task on this matter quite often...and I'd hope you'd be one who wouldn't be siding with the Lds on this matter.
I reject out of hand any notion that babies are born guiltless. They are born in sin and come forth from the womb lying and deceitful. There’s a reason why Christ had to be born of a virgin, he could not have the stain of original sin upon him which is passed from a father to his children.