Christians who are pro-choice may simply not believe everything they are told by the preachers.
They have been told that God gave them a brain to use, to analyze their experiences, and to sort out the wheat from the chaff. From inside their own heads they can see that they DO have minds that can analyze experiences, and decide what was good and sensible and what wasn't.
So some Christians are told about the Earth being Created a few thousand years ago, and laugh in the preachers' faces. Ditto with respect to the Flood. And so on. To believe that God directly Created the Universe in six Acts, but planted all that evidence implying Evolution of the Universe, galaxies, stars, planets, Life, and humanity -- that is to believe that God is a liar, see? Not to mention wimpy, if six Acts were needed when a really powerful God could have done it in one. So, better to belive that only one Act was needed, setting off the Big Bang, and that God, being omniscient, KNEW that humanity would be an inevitable consequence of the evolutionary laws built into the resulting Universe. Simple and logical, and reason enough to laugh at the preachers!
Which leads us to the unborn. The preachers might CLAIM that souls come into existence when an ovum is fertilized, but there are logical problems. For example, fertilization is a purely physical process involving lots of molecular biochemstry -- and ANYTHING that can be created by purely physical means can also be destroyed by purely physical means. It is logically impossible for an immortal soul to be created by the fertilization process. Well, then, some preachers know this, and claim that God creates the souls when fertilization happens. Really??? What about the significant percentage of fertilized eggs that just happen not to implant in a womb? What about the eggs that divide and then separate into identical twins? What about the eggs that contain genetic flaws so severe that the fetus dies after a couple of months, and then gets miscarried? Is God so mechanical as to mindlessly create souls for ALL fertilized human eggs, just because fertilization happens to have occurred? Is human biology so unlike that of all those soulless insects out there that its molecular machinery cannot automatically function ("live") without a soul for a while, say until months after fertilization (and after any twinning, and also after the ones with mangled genetics have naturally died and miscarried)? Next, have you ever heard about "sensory deprivation chambers"? A full-fledged soul jammed into an embryo is going to spend months without a sense of touch, smell, hearing, taste, sight, or even proprioception. No nevous system will exist for months, that is! And it is well documented that people spending more than a week in a sensory deprivation chamber can go stark staring mad. What kind of God would do that to an innocent soul, anyway? Finally, does God love a mindless soulless fetus so much more than an ensoulled and minded and Free-Willed adult pregnant woman that, even while omnisciently knowing the woman is likely to seek an abortion, God will create a soul for that fetus anyway, JUST so the woman can then be condemned if the abortion is done?
No, Christians who are pro-choice can simply believe God is smarter and less wimpy and more compassionate than described by the preachers, and therefore for most of a pregnancy, the fetus is not significantly different from any other soulless animal, the killing of which does not qualify as murder.
