I beleive Muhammad lied pure and simple. Neither demon or angel ever visited the man...jmo
Perhaps, but Islam is a demonic faith, so I can see why the army of darkness would want them around.
You’re right.
Muhammad was aided by the works of Bahira - a Nestorian Christian monk, the Meccan Jews and the Quraishi tribals - to cook up the Quran.
The three sources explain the Quran’s similarities with the Bible and Torah, as well as the practices of the Quraish.