One religious argument against abortion is that each human being is granted a soul at the moment of conception, and that destroying that “soul” is equivalent to murder.
The logic of this souls based argument leads to the conclusion that most methods of birth control, with the exception of condoms, are equivalent to mass murder.
Catholics dogma, of course, considers even the the use of condoms to be immoral. “AIDS is bad but condoms are worse” as the sainted Hitchens put it.
According to studies by the CDC and other medical authorities, less than 70% of all fertilized eggs will even implant into the mother’s womb and even if implantation does occur, there is a 25-50% chance of aborting before the mother even knows she is pregnant.
From the fundamentalist point of view, all those little souls are being given a home, only to be aborted before they even know they are alive.
The worlds most prolific abortionist (25-50% of all pregnancies) is God himself. If we are to grant that God exists, we must conclude that he loves abortion or why else would he perform so many of them.