All of this stuff ties together with Spencer's primary thesis: That the Eastern Roman Empire - xtian fanatics that they were - persecuted heretical groups and pushed them outside the empire.
http://en.wikipedia.org/wiki/Docetism
Spencer, of course, holds that the koran was a late 7th century work.
http://en.wikipedia.org/wiki/Docetism
Quote:The Qur'an has a docetic or gnostic Christology, viewing Jesus as a divine illuminator rather than the redeemer (as he is viewed in Christianity).[9] However, the Islamic docetism is not focused on the general life and person of Jesus or the Christ. In Islam "the Christ" (al-masiH) is not generally viewed as distinct from humanity nor a special spirit being as in docetism or some gnosticisms. Islamic docetism focuses on a denial of the crucifixion of Jesus. Sura 4:157–158 reads:
And because of their saying: We slew the Messiah, Jesus son of Mary, Allah's messenger — they slew him not nor crucified him, but it appeared so unto them; and lo! those who disagree concerning it are in doubt thereof; they have no knowledge thereof save pursuit of a conjecture; they slew him not for certain. But Allah took him up unto Himself. Allah was ever Mighty, Wise.[25]
The Qur'an was compiled in the mid-seventh century AD (around 650 CE), corresponding to the period when docetism was still commonly accepted and taught among some Christian sects.
Spencer, of course, holds that the koran was a late 7th century work.