I'm afraid I'm not following you here. The Church is talking about sparing lives. The abortionists are talking about destroying lives. Those are opposites. Not all killing is murder. But the deliberate killing of innocent persons is always murder. That's why it cannot be justified under any circumstances: Killing 30 babies every Saturday at Women's Surgi-center or killing 100,000 civilians in Nagasaki or killing sexual rival with a baseball bat.
You seem to be just another zealot who ignores their church's logical contradictions. No need to respond further.