So "Yahweh is the God the NA are interested in", but they find other gods interesting too, Allah is Yahweh, and therefore (to bring us back to why you started making such claims) Stenger was only referring to Yahweh (and by extension Allah), and his disproof all gods and discussions of specific other gods is due to...?
The "small 'g' unspecified conceptions of god" you specified were immaterial. By definition, then, they are nonexistent. Which means, by your definition, they can't exist, yet you stated it is impossible to prove their non-existence. Why did you state it is impossible to prove that something defined to be non-existent can't be proven not to exist?