I understand the point you are trying to make, and I do pray for a speedy and quick end to this war. But you can't compare a just war with abortion.
Governments have a moral obligation to protect their citizens from attack. Saddam Hussein has been funding and sheltering terrorists who killed American citizens abroad and in our country, and has not complied with the 1991 UN resolutions to disarm.
It is tragic that innocent people die in war. I certainly don't want any innocent civilians, particularly children, to be killed in bombing raids. We can and should pray for them.
I do have an obligation as a Catholic to listen to the Pope and give weight to his arguments. He is opposed to this war because he believes more people will die from it than by not doing anything at all. I don't know if he is right, but I do give strong leanings to his position. But he has not said that no Catholic may participate or support the war, nor will he.
But abortion is completely different. There is no justification for taking an innocent human life in its mother's womb. The baby isn't an invading force, it is a human person and a new creation. It is helpless and innocent and can not defend itself. The unborn have no government to protect them from the "choice" of the mother. Even the child's father can not protect the unborn's life.
But, biblically and traditionally, God did not condemn war and, in fact, there are times when war is necessary. But God did condemn murder, and abortion is murder of the most innocent and vulnerable in society.
God bless.
Part of the problem is that there is no consensus in society as to what constitutes a "person." Certainly, pro-lifers would argue that genetic identity is all that matters to qualify a life as a person. Others would say, however, that self-awareness is the critical factor that separates man from animal. Therefore, abortion would not constitute murder in their eyes. Without more information, it is impossible to achieve consensus on the problem.
To be pro-choice, one only has to believe that another reasonable person could come to the honest conclusion, after careful thought, that abortion is less than murder. It's also true that even people who do consider abortion to be murder consider it justified in certain cases (for example, pro-lifers who support exceptions for rape, incest, etc.)
If you and other Catholics believe that abortion is murder, that is one thing. But to support turning those who sincerely disagree with you into felons is quite another matter altogether. Some Catholics might choose to follow the teachings of their church in these matters, but might also realize how severe and punitive a pro-life solution to the problem would be for those whose philosophical views are not informed by religion or other systems of belief that claim to possess truth.
But however you may want to rationalize it, if you support the war in Iraq, you are supporting actions that are taking, and will take, innocent human lives. And no one disagrees that these lives are indeed persons. The pope, who is believed by Catholics to be the Vicar of Jesus Christ on earth, strongly opposes this war. Perhaps those Catholics who oppose him on this particular matter should try to understand why other Catholics might oppose him on other difficult matters including abortion.