The early Bibles weren’t in Arabic because most all of them were illiterate.
The Quran wasn’t written by Muhammad because even he was illiterate. It was written over 100 years after his death.
They’re still living in the dark ages. If not for us finding oil in the middle east, their greatest industry would be weaving rugs.
Yes, but their rugs can fly ... no easy feat.
Possible. The Muslim belief is that it was compiled in its present form about 20 years after Mo died. Modern skeptical scholars are (of course!) skeptical, with some claiming that it wasn't compiled for a century or even several.
To my mind, their claims sound a lot like the "higher criticism" of the Bible. Seems likely to me the Koran was assembled in basically its present form while many of those who had known Mo were still around.