Objective morality as a proper basic belief

[SteveII]

Except that situational ethics isn't the definition of a subjective morality at all.  All ethics are inherently situational...as there has to be a moral situation for it to be a moral issue in the first place.  Circumstances are as objective as harm is.

This is why, for example, we call one killer a hero and another a monster and another unfit to be held accountable.  Nothing about the act has changed, killing is objectively harmful, but we modify or withold moral desert based upon the agency of the subject in question and the circumstance in which (or even by which) the act was carried out.  Here again, you've -explicitly- confused moral absolutism for moral objectivity.

Right, but you have just illustrated that harm is not the measurement in the three scenarios. It was an underlying set of values that say that say humans have value, individually, they have intrinsic rights not to be killed, that these rights can be superseded in certain circumstances, and accountability requires an understanding of these underlying values. Regarding this last example, someone unfit to be held accountable might be a person that knew very well that killing would create harm (resulting in a dead guy), but did not have a firm grasp on the underlying value framework to make sense of it.