[...] Islamic belief, however simply or modestly it may be stated, is an extreme position to begin with. No human being can possibly claim to know that there is a God at all, or that there are, or were, any other gods to be repudiated. And when these ontological claims have collided, as they must, with their logical limits, it is even further beyond the cognitive capacity of any person to claim without embarrassment that the lord of creation spoke his ultimate words to an unlettered merchant in seventh-century Arabia. Those who utter such fantastic braggings, however many times a day they do so, can by definition have no idea what they are talking about.
Ouch! The truth hurts.