I look at the whole problem as a window into human nature. As JayAck points out above the same people who object the loudest to abortion rights also object to sex education and other forms of contraception. This clearly demonstrates that their objections have less to do with the fates of unborn souls than it does with discomfort over recreational sex.
So what is the association between authoritarian religious beliefs and discomfort with pleasure? And why do the same people who experience such discomfort with sexual pleasure nevertheless have such enthusiasm for warfare? Again, it's obvious that concern over innocent souls has absolutely nothing to do with the question.