LMAO at this. The Qu'ran doesn't say anything about a black devil. Breh, go and read all 6,000 verses before you come in here with that BS.
And no, the Arabs aren't the chosen people. We believe Allah chose the Qur'an to be revealed in Arabic was because the Arabs were a CORRUPT people who worshipped different idols and did many injustices to themselves and others. They were a broken people and amongst them was a man, the Prophet Muhammad, who was pure of heart and was chosen to carry the message of the Prophets/Messengers before him.
The Prophet in his sermon before he died preached there was no difference/superiority between people (black or white or arab v non arab) except in terms of God consciousness. Read this stuff! Its in the authentic traditions.
The Prophet also freed many slaves in his lifetime. In the 7th century, slavery was one of those things that was huge and part of society. But the Prophet spoke about the virtues of not treating them like animals and giving them their due rights and freedom. Thousands upon thousands were freed in his life.
Now, so sit somewhere my brother and read a book. Islam is for all mankind not some Arabs. The Qur'anic Arabic is one of the purest things a human being can read and contemplate on. There's no doubt it is divine.