If you think about Abortion as murder then why the hell would you marry an atheist who is pro-abortion? I'm pro-abortion because well, if you look at the rule of it's not fully developed, it's not breathing for itself, it's not feeding itself essentially until a baby is born it is merely a parasite on the mothers body. We all kill parasites, when your dog/cat gets fleas it's out with the flea treatments, when your kid/self gets headlice or genetal lice it's out with the headlice treatments so why would a baby which until it is born and therefore "giving itself life" be considered anything other than a parasite?