Jon claimed to be a Gnostic early on. Most modern gnostics use the Bible, the book of Enoch, book of Thomas, and some other books like Secret of John. For a very brief overview of Gnostic faith, read the Secret of John (available here:
http://gnosis.org/naghamm/apocjn-davies.html).
The few people in this thread who mentioned that John claims that Jesus is Satan seemed to miss understand the theology: Jesus and old testament Satan/serpent are the same person, and are considered to be "good". The old testament God is the Demiurge, who is the Creator and "bad," because he's trapped us all in an evil world. The serpent story is the story of the first time Jesus tried to save humanity from creation. Some forms of Gnostic faith distinguish Yahweh and Elohim as two separate entities, one of which is the Demiurge/Creator/Evil, one of which is God/Father of Christ/Good. Most translations of the bible distinguish these two names as LORD or Adonai for Yahweh, and God for Elohim.
It's also very similar to Scientology, to the point where Scientology is probably ripped off of it.
The Holy Bible was made canon by the Catholics specifically to stop the spread of Gnosticism, which is probably part of why Jon considers them evil.