This is the epistemological stumbling block of living in the west, is this cultural remnant of christianity that compels us to view all things first and foremost through the lens of good or evil, moral or immoral, fault and blame.
States are not perfect frictionless spheres floating in a vaccum and acting purely off some set of moral principles. They are enormous machines rooted into existence by countless interfaces, big and small, with the world as it exists. A state operates on material conditions, on probabilities, contingencies and eventualities. The number of trigger states in a computer is nothing compared to the volume of procedure and protocol involved in the running of a society. With this in mind, the more relevant question to ask with any geopolitical event is not "Who is morally responsible for this?" but "Is this outcome a logical one given our understanding of the factors at play?"