Polytheism and the Mormon Hermeneutic

Mormons claim that there are gods other than the God of the Bible. They deny, on the other hand, that their belief makes them polytheists, because they only worship one god. However, even that is not quite true, since they claim that the Father, Son, and Holy Spirit are three distinct gods, and they worship all three. But that is beside my point.

It is true that the Bible refers to other "gods," i. e., the idols worshiped by pagan nations. Furthermore, it describes them in active, anthropomorphic terms, such as Psalm 97:7: "Worship Him, all you gods!" As when the Bible talks about the body parts of God, Mormons insist that these references are literal. 

However, that assertion runs into trouble when the whole Bible is considered, rather than just isolated prooftexts. 

For example, there is a plain, nonpoetic reference in Jeremiah 2:11: "Has a nation changed its gods, even though they are no gods? But My people have changed their Glory for that which does not profit." Yes, that prophet tells us, the nations have gods, but they are not real gods. Surely, in a rational hermeneutic, the statements of plain narrative should take precedence over statements in poetry. Yet, that is not the hermeneutic of Mormonism.