It seems like this is more related to pluralism and metaphysics, but here goes…

Adam,

At least you make the same mistake when referring to other religions that you do with Christianity.  You are assuming that the image of God that is presented in Islamic or Hindu texts is a perfect reflection of the nature of their "gods" rather than a flawed description of our God.  When they have orthopraxy problems in their faith because of mistakes in the "image" of God it is no different than the mistakes that result from certain Christian images of God.

The problem is that we all have different images of God but there is only one creative force in the universe.  It is important that we recognize that what we think is God is really our “image” of him.  You can argue that your image is “better” or more “accurate” (and I would agree) but you can’t argue that only our religion is worshipping the real force while the other religions are worshipping another force.  That is not fair to us or them. 

For example: I have a specific mental image of my wife that is a result of the experiences and information about her that I have collected in our lives together.   Her co-workers have another mental image of her that could never be the same as mine (at least I hope not!!!!).   If we all sat down and described her, our stories about her would be colored so much by our own perspective that a 3rd party might not think it is the same person.  But I don’t think for a minute that my wife has a hidden life and she is lying to me or to her co-workers.  It is a product of how our minds collect information and formulate perspectives.

The same is true of God. When we speak about God we are speaking about the mental image we have formulated that allows us to speak about the unspeakable.  Religions are formed to create communities centered on a group of people with a similar image of God.   This in NO way means that all religions and all sacred texts are “right”.  It just means that we all have baggage, agendas, and cultural experiences that color the image of God which we create.  We do not create God, but we do create our image of him.  You could argue that God helps dictate those images by the particular encounters he allows to occur, but clearly those encounters are diverse also. 

This relates to how you view the scripture. I think it is helpful to see the bible as texts written through the lens of 2 cultural “images of God”.  The first being the ancient Hebrew lens and the 2nd being the early Christian lens that built on the story of the first.   I think the “word of God” is the truth that rings through in all of these views.  The “word” is the truth that has been around with God sense the beginning and became flesh in the life and message of Jesus.