I can still remember my first pro-life rally. I was a pleasantly plump fifth grader with my family on the steps of the Oklahoma City courthouse, holding our Knights of Columbus pro-life signs, showing our support for all human life, separated only by the accident of birth.
Because of the Catholic Church's consistent stance against abortion and my family's pro-life commitment (my dad is a sidewalk counselor), I grew up assuming that if you were Christian, you must be anti-abortion. I could not understand how one could reconcile the Sermon on the Mount with abortion, though many of my Protestant friends were mostly against abortion, except for the "hard cases".
And this has always bothered me.
Abortion either is or is not the killing of an innocent human person.