Yes, we know people possess psychic powers but they are definitely not from God. (Deuteronomy 18:9-12) If demons can foretell an event, then they can also make it happen. If they can tell you things that only your dead aunt would know, then who was in existence long before all of us....the demons know everything about everyone.
People who say that they can predict the future are working against God who purposely does not tell you your individual future.
God will foretell things that will happen to his people as a group, but individually, he does not tell us what will happen.
If God says that Spiritism is "detestable" to him, then it tells you that the source is evil.