Northern progressives voted for the 13th amendment, southern conservatives voted against it, party affiliation switched after the civil rights act of 1964
So in other words, people like you voted against abolishing slavery, so it's pretty funny when you try to claim you're on the right side of history this time when it comes to abortion. I can assure you, 10, 20, 100 years from now, people will view the "ABORTION IS MURDER!!" people as a lunatic fringe. Republicans have already lost the social conservatism battle, American society has moved past the religious Christian fervor of the Reagan era from which your irrational belief originated. That's why Ted Cruz got spanked in the republican primary just like Huckabee and Santorum before him. Not even the majority of republicans want that.