Pre-1970s, almost nobody was saying abortion was murder. You've been played for a fool by your political cult.
It was primarily driven by the evangelicals. Up through the 1960s, they were using segregation as the issue to fire up their base. That become unpalatable to the nation, so their leaders needed a new issue to keep the ignorant rubes hysterical. They settled on abortion, and so they started pushing the "abortion is murder!" propaganda.
What you and the pro-lifers peddle here is rank historical revisionism, as well as scientific twaddle and a moral abomination. All because you're obeying your segregationist masters.