for he will famish all the gods of the earth
Nature, how exactly do you famish something that is made up? Fake dieties can not be fanished, but real ones can. Deny a god all of his worshipers, so that no one exists that believes in it, and some have said you will have destroyed said god. That sounds similar to that idea right there.

There are just as many scriptures making hint to other gods existing as there are of God stating that he is the only god. There is a reason for this... if your God is infallable, then what was written there was not a mistake, and there are alot of references that just dont apply to imaginary gods.