Perhaps I over-generalized. The catechism states that the “The evaluation of these conditions for moral legitimacy belongs to the prudential judgment of those who have responsibility for the common good” when deciding whether war is just or unjust.
Those with the responsibility for the common good of their people are the national leaders.
You are saying that condemnation of specific war actions equates to declaring a war unjust - that is not the case - specific actions of war can be condemned by the Church - in which case it can be implied that the entire war is unjust - but not necessarily so.
The decision to apply the just war logic and determne whether to engage in the war actions is that of the national leader because he/she make the ultimate decisions.
The fact remains that anyone declaring the war unjust - outside of an Encyclical or Papal decree of some kind - is expressing their opinion. You cannot say the Church has declared the Iraq war unjust - that is simply an extension of some opinions of individuals inside the Church. Other individuals have different opinions.
Because there are the conditions of war - it is open for people to discuss and come to their own conclusion - and the ultimate responsibiliy falls with the national leader.
This contrasts with doctrinal and moral truths to which opposition of is sinful under all circumstances.
Here is the paragraph from the Catechism that addresses just war:
2309 The strict conditions for legitimate defense by military force require rigorous consideration. The gravity of such a decision makes it subject to rigorous conditions of moral legitimacy. At one and the same time:
- the damage inflicted by the aggressor on the nation or community of nations must be lasting, grave, and certain;
- all other means of putting an end to it must have been shown to be impractical or ineffective;
- there must be serious prospects of success;
- the use of arms must not produce evils and disorders graver than the evil to be eliminated. The power of modem means of destruction weighs very heavily in evaluating this condition.
These are the traditional elements enumerated in what is called the “just war” doctrine.
The evaluation of these conditions for moral legitimacy belongs to the prudential judgment of those who have responsibility for the common good.