Fundamentalist Christians hold the Holy Bible to be the word of God, and hence every word of it to be the literal truth.
Fundamentalist atheists hold the Holy Bible to be based on nothing more than a collection of myths. In particular, they hold that the story about Jesus — including the new star in the East that heralded his birth, his delivery in a stable, the hay-filled manger in which as a new-born infant he was laid, his ministry in the company of twelve disciples, his death, his resurrection and his ascent unto Heaven — is taken virtually in its entirety from accounts of the lives of earlier religious figures including the Egyptian gods, Osiris and Horus, the Zoroastrian divinity, Mithras, and the Hindu deity, Krishna. In addition, they point to the inconsistencies in the gospel accounts of Jesus's life and teachings. On such grounds they reject Christianity as a false religion.