Because the Holy Ghost has witnessed unto me that the Koran possesses some truths but is not the gospel of the Father.<quoted text>You do not seem to understand the meaning of a "claim". The story is a claim. It is a claim without evidence.
And yes, we do not accept this claim on blind faith just as we do not accept the bible or the Koran on blind faith. This is what separates the gullible from the critical thinkers.
Why do you not accept the Koran on this blind faith?
Why is this story a claim?