Quran in its original form is written in the Arabic language, Muhammad and his teachings originated from Mecca. Mecca being an ancient city in Saudi Arabia was a place of pagan worship long before the birth of Muhammad. So did the pagan Arabs create a new religion and make it look divine?
The Quran is written in the classical Arab language, a form of Arabic used about 1,400 years ago. So how do we know if the Arabs dictated the contents of the Quran or not? If indeed they dictated the Quran the Arabs would have been shown to be a superior race.
In the Quran the Arabs are not given any significance whatsoever at all. It has been stated many times the attributes to the people loved by God but Arabs are in none of it,
…God loves those who act justly.
But yes, whoever fulfils his commitment and fears God- then indeed, God loves those who fear Him.
…and Godloves the doers of good
…And God loves the steadfast.
there are many more occasions God talks about the type of people He loves but nothing is based on race or culture or even sex being male or female does not matter. If the Quran was written by the Arabs, it would have been “God loves Arabs”, but this phrase is nowhere to be seen. On the contrary God mentions things that He does not like but were the culture of the Arabs at the time.
And when one of them is informed of [the birth of] a female, his face becomes dark, and he suppresses grief. He hides himself from the people because of the ill of which he has been informed. Should he keep it in humiliation or bury it in the ground? Unquestionably, evil is what they decide.
Arabs before Islam used to bury their daughters alive, this i called female infanticide. Daughters were looked as a bad omen at that time and this has been shunned in the Quran. If the Quran was written by the Arabs it would have upheld their culture and race.
On the other hand even poets were mesmerized by the verses of the Quran, calling it “magic”. Waleed Ibn al-Mughira the most talented poet of the time said,
And what can I say? For I swear by God, there is none among you who knows poetry as well as I do, nor can any compete with me in composition or rhetoric- not even the poetry of jinns! And yet, I swear by Allah, Muhammad’s speech (Quran) does not bear any similarity to anything I know, and I swear by God, the speech that he says is very sweet, and is adorned with beauty and Charm.
Then do they not reflect upon the Qur’an? If it had been from [any] other than God, they would have found within it much contradiction.
 Abu Ammar Yasir Qadhi. An Introduction to the Sciences of the Qur’an. Al- Hidayah. 1999, p. 269.