I will have to take a look. BTW, I am reminded that westerners who are so skeptical of the Bible and the "historical Jesus" have little interest in the "historical Mohammed." Almost nothing of what we know about him is based on non-Islamic sources. They simply accepts as true all that the Muslims says about him. But even the earliest versions of the Koran were assembled a full generation after his death, the first history written almost two generations later.
In light of all the so-called documentaries on Jesus, you bring up an interesting point.
Thanks to The DaVinci Code, National Geographic, The History Channel, etc., have all been doing their own shows on Jesus, His existence, archeological evidence and rumors. They're completely unafraid to explore outlandish speculations and take Scripture out of context but completely IGNORE the life and times of Mohammad. I don't think Muslims would want their so-called prophet's treatment of his adopted son and daughter-in-law brought to light, not to mention other aspects of his conduct while living.
It's not as if Christians will threaten to cut their heads off...