> Literally the central trigger point of the story

The fact that you and other insist on this really gets at the crux of this whole problem. There are two notable positions on criminality and punishment: yours, which is broadly that the justice system exists, at least in part, to deliver righteous punishment on the deserving, and the position of those appalled by the treatment here, which is that the purpose of the justice system is primarily to protect people, and then to deliver predictable, proportionate punishment of those found guilty to disincentivize criminal behavior. If you think that torture of someone detained but not found guilty might be justifiable if they're accused of a sufficiently heinous crime then you have an illiberal position that can and will be used to enable abuse of the criminal justice system to inflict extralegal punishment on anyone for any reason.