OK, let's see the situation proposed by Kathy: we have a woman who wants a child, and her best friend who thinks that it is a very bad idea. As Kathy presents it, it sounds as if failing to change the mind of the first woman would somehow turn the second woman's friendly feelings into burning hate. Frankly, I just don't see this happening: a true friend will stick with you, even when he or she thinks that you're making a mistake. If all it takes for someone to start hating you is that you didn't follow his advice, that person wasn't much of a friend to start with... As a matter of fact, such a person would be in dire need of a long-sleeved shirt and an extended stay with the men in white.
The first woman lashing out against her friend when she disagrees seems much more plausible: she could feel hurt/betrayed that her friend doesn't support her, she could be unconsciously trying to shut up the voice of reason by driving her friend away (noone enjoys being told that they must renounce their heart's desire, particularly when the one saying it has solid arguments), the friend's arguments could have struck a nerve (being told that you're unfit to be a mother when it is your life's dream has to hurt, even if you know it intellectually),... When reason stand in the way of emotions/desires, anger can flare pretty quickly.
In pretty much every situation I can imagine, the friend sincerely thinks that the pregnancy would be an error and only wants what is best for her friend (and/or for the potential kid): it could be that the woman is too young, too old, unable to carry the pregnancy to term, economically unable to support a child/another child, that she is unable to handle the responsibility, that she is an addict, that she is in an abusive relation,... The only situations I can think of where the friend's opposition wouldn't be legitimate would be if said friend is mentally unbalanced, with for example an unhealthy attachment to her best friend that makes her unwilling to share her with a kid, of an irrational fear/hate of pregnancy/children. Or if she was a raving racist/bigot who objected to her friend having a mixed-race kid/a kid with a heathen father, I suppose :P
In any case, no one has an abortion for the sake of having an abortion, and only the most hysterical and fucktarded pro-lifers actually believe that shoddily-built strawman...
