“The “personhood” movement represents the most ideologically consistent endpoint of the anti-abortion movement.”
Not the most consistent, only the most extreme endpoint. To be anti-abortion you only need to be anti-murder. There is not any biblical, empirical, or I think even philosophical evidence a single cell or even the first several millions of cells can then be or have yet been a person.
What profits neither side in the argument is what is also most prudent and I think most likely morally correct. Define human life for federal purposes as beginning by the third trimester, or what the local jurisdiction uses if it is earlier, but prohibit definitions which have human life beginning in the first trimester.
Of course this would prohibit late-term abortions of convenience an preempt bans on some contraceptives. Win-win.
