Fred Clark, the Slacktivist, has the all-too-recent history on Evangelical Protestants' anti-abortion views. This is long, so below I have a scrap of excerpt from the longer history.
It's a compelling story, no question about it. Except for one thing: It isn't true.
Although various Roman Catholic groups denounced the ruling, and Christianity Today complained that the Roe decision "runs counter to the moral teachings of Christianity through the ages but also to the moral sense of the American people," the vast majority of evangelical leaders said virtually nothing about it; many of those who did comment actually applauded the decision. W. Barry Garrett of Baptist Press wrote, "Religious liberty, human equality and justice are advanced by the Supreme Court abortion decision." Indeed, even before the Roe decision, the messengers (delegates) to the 1971 Southern Baptist Convention gathering in St. Louis, Missouri, adopted a resolution that stated, "we call upon Southern Baptists to work for legislation that will allow the possibility of abortion under such conditions as rape, incest, clear evidence of severe fetal deformity, and carefully ascertained evidence of the likelihood of damage to the emotional, mental, and physical health of the mother." W.A. Criswell, former president of the Southern Baptist Convention and pastor of First Baptist Church in Dallas, Texas, expressed his satisfaction with the Roe v. Wade ruling. "I have always felt that it was only after a child was born and had a life separate from its mother that it became an individual person," the redoubtable fundamentalist declared, "and it has always, therefore, seemed to me that what is best for the mother and for the future should be allowed."
In 1973, most evangelicals regarded opposition to abortion as a Catholic Thing . . .