Not that such views are expressed in OP, maybe they're actually very principled on this matter (e.g. 1 fetus aborted is equal to one Palestinian kid being blown up, or one homeless person dying to exposure). But I've pretty much always found these things are a package deal.

I think this also ignores the history of anti-abortion politics. Even for Catholics it's a relatively recent invention, let alone american protestants, and it always seems to rear its head during fears of demographic decline. The individual (stated) belief follows the political and material circumstances before it.