I have read several of your articles on Islam, and have noted you state several times your belief that the Qur’an is not an inspired text, and the Bible is. Whilst I agree with you on this, I would be interested in the reasons and evidence you have for this belief.
Although I don’t know how others might respond to your question, my own view is this. First, the Bible claims to be an inspired text: “All Scripture is inspired by God” (2 Tim. 3:16). Of course, this does NOT prove that it really is inspired. However, if the Bible nowhere claimed to be inspired, then we would hardly have good reason to believe that it was. Thus, what the text claims for itself is important.
Second, I think there is strong evidence to embrace biblical inspiration for a number of reasons. For sake of time, let me mention only one: the accurate fulfillment (in the life, ministry, death and resurrection of Jesus) of very specific Messianic prophecies (made centuries before Jesus was even born). The specificity of these prophecies, and their accurate fulfillment in the life of Jesus, constitutes strong evidence for divine inspiration. After all, who else knows the future with that kind of accuracy other than an omniscient God?
Finally, if the Bible is inspired by God, then it would seem logically impossible for the Qur’an to also be divinely inspired. Why? Because both texts teach very different doctrines, doctrines that are not logically consistent with one another. For example, the Qur’an denies the doctrine of the Trinity and the doctrine of the Incarnation, etc. But the Bible teaches both doctrines. Clearly, both texts cannot be correct, for this would violate the law of non-contradiction. Thus, if the Bible is inspired by God, then it logically follows that the Qur’an is not (because it contradicts clear biblical teaching on a number of important doctrines).
Hope this helps.