Western scientists, Islamologists, Arabist and others (and not all of them Jews or Christians) are not convinced that the text of the Quran as we have it today, is similar to the texts that came into existence at the time of the Islamic prophet Muhammad. Traditions about how the Quran was created are distrusted and often rejected by these western (and eastern) experts.
Not so by Muslims. Any critique of the Islamic view of how the Quran was created, are rejected vehemently, and if needed, with the force of government, imprisonment, or worse. Here a description of an orthodox Muslim about how the Quran was created, for our instruction. Have a look HERE.