There's a third option: that enough time hasn't passed. I said they will eventually become Catholic. A person generally can't understand multiplication until they understand addition.
I guess my question is why. What makes it inevitable?
Because it’s based around facts, hence an honest heart, and benevolence, hence a good heart. If a person looks into the Resurrection and whether it happened, they will inevitably become a Bible believing Christian, and when they ask where the Bible came from and who has the right interpretation of it, they will become Catholic.