Just reposting this excellent point from lemmygrad
If seems to me that if we're willing to acknowledge that our subjective estimation of probabilities aren't necessarily any good at predicting actual outcomes we could not only save ourselves a ton of trouble handwringing over what level of perceived benefit justifies turning on the orphan mulcher, it would also go a long way to ensuring we don't accidentally make common cause with the people who do enjoy mulching orphans.
You can pretty easily draw a thoughline from the slapdash deployment of political violence to the elevation of ghouls like Beria to the head of the organs of state.