You may be right about our draw to the sacred, and I think you're certainly right about how Christianity trivializes "spiritual" or existential questions by tying them to history and to literalistic claims.

But I suspect the mystery behind the experience of the sacred is objective rather than just a projection of our parochial interests. I have an upcoming article on pantheism which will touch on this.

The mystery and absurdity of godless nature's creativity doesn't entail theism, but it does undermine the more hubristic formulations of new atheism.