If judaism does not practice spiritism, then there’s nothing left but mere interpretation.
If christianity does not practice spiritism, then there’s nothing left but mere interpretation.
Satan is a master in developing opposing interpretations that will never come together.
Once this theological stalemate is accomplished, another non-spiritualist religion can arise that will challenge both but is nothing of its own. An empty promise to empty peoples, a perfect tool in the hands of satan to eradicate God’s work on earth. But at the same time, also a remedy in the hands of God to eradicate this stubborn self-satisfaction from mere interpretation.