The human species has been hoodwinked.
The Old Testament was heavily influenced by other cultures, politics of the day and personal aspirations of kings, authors and prophets. The Old Testament was written as much from the outside of Judaism as from the inside. The actual quills may have been held by the Hebrews but the ideas were not their own.
The Old Testament is riddled with oral traditions from hundreds of cultures. Noah, Jonah, Adam, Job and Lot all have very strong connections to civilizations prior to and parallel with the very early Hebrews. Very little of the Old Testament is revelation or new material entry from within the Hebrew culture or divinely inspired.