If the third party carrying out the "justice" is merely implementing the vengeful wishes of the most irrational party (i.e. the victim or their family) then I w

If the third party carrying out the "justice" is merely implementing the vengeful wishes of the most irrational party (i.e. the victim or their family) then I wouldn't say they are "disinterested" in any practical sense. Also, by the supposed logic of "restoring natural harmony", if someone kills your family, should you be allowed to kill theirs?