No, it doesn't sound familiar TO ME. To the shaman, the basis for his faith in the volcano god was whatever he made up himself, or was told by other men. IOW, nothing. THAT sounds familiar to me. :) By contrast, we have the Holy scriptures which are God's revelation to us directly. The shaman didn't have God-breathed words.
Hinduism is a revealed religion, and so is Manichean Gnosticism (Blessed Augustine of Hippo belonged to that Christian cult before becoming Christian). In fact, the latter was seriously competing with Christianity.
The shaman didn't have God-breathed words
How do you know that? Origen was a superb theologian, and yet he believed the true revelation to be that of Gnostics. They all believed in Christ too, and used the Scripture. What proof do you have that any of the books in the Bible are "God-breathed?" Do they glow in the dark? Do they have a seal of authenticity on them?
FK, have you ever heard of the concept of “sporoi”? The word means “seeds” and the Fathers spoke of flashes of the revelation of God to mankind among, generally, pre-Christian pagans as “sporoi”. These seeds of The Truth are seen through history and throughout the world. Hinduism and Buddhism are full of them. Since we don't and can't know where the Spirit goes, it seems to me we ought not to make such blanket statements as yours above.