Speaking with a friend recently about abortion, I heard an old line I hadn't heard in a long time: "The fetus is just a bundle of cells, who cares about it?" (Or something like that).
Well, in the modern reductionist worldview, everyone is "just a bundle of cells." That's why it's called reductionism. And this includes the abortionists whose murders so inflame the average liberal. Why should we care about them any more than a fetus if they're both equally reducible to valueless particles bouncing around deterministically in the void? What's to stop anyone from sucking the brains out of anyone's skull with a vacuum cleaner if we're all just meaningless globs of tissue? (Or is it the case that societies can and do tell people, all the time, what to do with their bodies, and do so legitimately, and can reasonably expect compliance and punish noncompliance, so that "my body, my choice" suddenly rings strikingly hollow?)
Abortion is the one issue in which the rank inhumanity of the modern worldview shines through most clearly, and puts normal people ill-at-ease.
For this reason, it's one of the few areas in which the left's triumph has been constrained almost solely to the political sphere. They simply have not succeeded in affecting total cultural sanction of abortion, and their efforts to do so, as Jehu points out, almost always reveal them for the tin-eared, touchy, ungrateful, infanticidal degenerates that they actually are. And, as such, it's the one issue on which the right ought to push hardest.