The fastest growing religion in the modern world is Christianity. Islam is and always will be in 2nd place.
I notice in your article that the author choose to ignore the two oldest codexes that were available at the time of Muhammad and those two codexes are the Codex Vanticanus, which dates to the 4th century and the Codex Sinaiticus, which also dates to the 4th century. Since the Codex Sinaiticus was discovered in Saudia Arabia it is extremely likely that Muhammad was aware of its existence. Therefore if your Allah is the all knowing God he would have known this. If you are going to critique the Bible at least get your facts right.