TL;DR: An old testament reference to the "malevolent god". E.g. "god in the old testament wasn't so nice or forgiving.."
> In Gnosticism, the Demiurge is the lesser creator god who fashioned the material world and is often seen as the God of the Old Testament, Yahweh. Unlike the supreme, unknowable God, the Demiurge is ignorant, imperfect, and sometimes malevolent, responsible for the flaws of the physical world and the imprisonment of the divine spark within humans. Gnostic beliefs see a spiritual journey not as submitting to the Demiurge, but as a process of escaping his creation to return to the true, good God.
See also: https://gnosticismexplained.org/the-gnostic-demiurge/