At least he’s consistent. If one actually believe that personhood or ensoulment or whatever occurs at conception then I don’t see why rape should make a difference in the status of an entity that’s blameless in the circumstances surrounding its creation.
Of course I think sentience / self awareness should be the point where a discussion of comparative rights even begins, that “life” is irrelevant and that this entire personhood debate was settled at the other end with the Terri Schiavo case.