All abortions are not the same abortions. First and early second trimester abortions operate on the theory that no fetus can survive without access to the womb- it is not yet viable life. Thus, simply evacuating the fetus from it's literal "life support", the mother, via medication or surgical removal is enough to cause death. In the case of very late or 'partial birth', as is clearly seen through many descriptions of it, one must deliberately keep PART but not ALL of the child in the mother and deliberately make some attempt at it's life, namely draining out or damaging a body part. This is done with the awareness that the child would survive if it completed the rest of it's birth.
As a personal practise, I believe that I can understand having a very early abortion- one at which point you, in your heart, do not yet consider the fetus that you're carrying your own child- and more importantly, from a religous standpoint, you believe does not have a soul.
I believe in the severely limited use of partial birth abortion, even if it is contrary to my faith. By severely limited, I mean to say that a mother found out too late in the pregnancy that the child has an honestly horrific and painful terminal illness which will lead to nothing but suffering.. would you rather -your- own baby have to suffer painful death for years before passing? I absolutely don't agree with it in ANY other use, though. None whatsoever. I often use this example because I've -known- couples who've had children with infantile tay sachs- they spend three or four years watching a child who has no understanding of life be stripped away of sight and of thought, of the ability to understand any aspect of life, before finally dying, no older than six years old.
That said, I don't think partial-birth abortion is going anywhere any time soon. Even if it is something -I- disagree with, the law holds that you are not a recognised human being until you take your very first breath- and I would like it to stay that way, because the moment we try and attempt to define the every-changing definition of "viable" life we will enter the very murky waters by which we can soon define the smallest cluster of cells as "viable life" and strip women of control over their bodies.
"She thinks... she can make people do what she wants or needs, what is right, by the sheer force of her own talent, not by forcing them... she can teach them and persuade them... that they'll catch it from her. This is still faith in their rationality, in the omnipotence of reason. The mistake? Reason is not automatic. Those who deny it cannot be conquered by it. Do not count on them."