Top posting for a reason.
"Not that I think the pro-life position is all religious quackery."
I do think so, for one simple reason: the position has no resemblance to any Schweitzerian reverence for life. It does not extend to animals. It's only about the sanctity of *human* life, and if that isn't a religious view then the only other possible explanation is an execrable bigotry.
When I was ten we visited the Smithsonian. In one exhibit there were a few dozen taxidermied animals, shrunken and sad with age. A few of them were labeled "Extinct." It was one of the most disturbing moments of my life; about 20 minutes later I vomited, the only time in my life I have reacted that way. All my political views began with that exhibit.
I am more misanthropic than the elder Franz Liszt. I love animals; when I die all my money will go to the Loro Parque Fundación in Spain to help keep some parrots from extinction. I donate to anti-animal-cruelty causes and shelters for abandoned pets.
I despise how our species is wiping out all the others because everyone wants babies. The global animal population has fallen over 50% since 1970.
This is why I am pro-abortion more than pro-choice. I'd prefer a global population substantially lower than when I was born.