Chatars

How and when the Gnostic.movement began is not know Some trace its origin to the Jews, others to the Christians and still others to the Orientsl or Helenistic paganism.
Agnostic were numerous Hans Jonas separate them into twobasic groups the Iranian and the Syrian Egyptians.

The Iranians taught thatdarkness and divine light were ci existent from Creation.

The Syrian Egyptians taught that the divine light existed alone in the beginning and that evil somehow emerged from it.

The Gnostics taught that God is unknown and Unknowable; the creator of this world being the chief of arching Jehovah the God of the old Testament.

After the Roman Empire adopted Christianity as the state religion Gnosticism was kept alive by sects which were necessary characterized as heretical. One such sect was that if the Chatars (from the Greek cathartic meaning "the pure"). They taught that Jehovah was Satan, that procreation was sinful, and preferable sexual would not lead to conception.
Please Innocentius  III ordered an armed crusade against the Chatars.


Source
Magic in the Space Age The rise of Neo Paganism by Valiant Thor