Pro-life rhetoric isn't the real issue for pro-choicers anyway. The bedrock pro-life view -- which, if you haven't figured it out already, I share -- is that abortion is the unjust killing of living human beings. Any expression of that view, any political action taken to advance it, is going to offend many pro-choicers, and could lead some people to violent acts. Pro-choicers who want pro-lifers to stop saying that abortion kills unborn children aren't objecting to the pro-life movement's rhetoric; they're objecting to its existence.

— Ramesh Ponnuru. This is exactly right, and should be read in conjunction with Ross Douthat’s recent post on the same subject.