Personally, I think it is a different thing. However, sure, they are murderers. Probably in some cases anyway. I certainly believe, generally speaking, that a woman who intentionally kills a newborn is a murderer (there may be exceptions of mercy, obviously i can't speak to every single case). Serial killers have instincts too. The point of that statement is not to say that an abortion equates to a serial killer, just that instincts aren't always "good". At some point, an individual gains a right to life no matter what the mother thinks. When do you think that is?