A significant amount of republicans probably sincerely believe that this tragedy is worth “saving the lives of all the other babies that would have been murdered.”

Their moral calculus is foolish and predicated on questionable-at-best axioms. They are well meaning but functionally bad people.

Another significant chunk also adheres to “the cruelty is the point.” They are bad people.

Unfortunately, for various reasons, republicans have a disproportionate amount of power in the US.