It's an emotive subject. I can only speak for myself - but depending on the stage of pregnancy, an unborn child is not a person. As such, it's not murder. An unborn fetus may have the potential to be fully a human being, but that's a different thing.
I won't comment on your views about rape victims. I find them very insensitive, and inflammatory.
Fundamentally, I do not think abortion is murder. People in need of Mental Health Services can't get it, so how are pregnant women supposed to? Who is going to pay for it? And what kind of mental health service is going to solve the ills of having to look into their rapists eyes every day of their lives?
And finally, the US is ranked fifth in the world for executions. So, even if I did believe abortion is murder, I'd have to accept that some States in the republic do it, and do it every single year. State sponsored murder is, apparently, acceptable.