I have read the Quran twice and studied the life of Mohammed for years, and can tell you for sure that it is a master work of Satan in many ways. Oddly, that was one of the things that helped lead me to Christ. I think that too many in our society has gone too soft and fail to see the evil in this world. Sometimes it is easier to see Good when you see the Evil in this world. Islam is Satan's greatest success that I know of because of the 1.5 billion followers.
As a Christian, you should at least know the following verses from the Quran:
ISLAM denies Jesus's divinity and His Crucifixion:
Surah 4:17: And they did not kill him, nor did they crucify him;
ISLAM denies the trinity, and confuses Mary to be part of the Trinity: Quran 4:171 And do not say, "Three"; desist - it is better for you. Indeed, Allah is but one God.
ISLAM defines Jews and Christians as enemies:
Quran 5:51: O you who have believed, do not take the Jews and the Christians as allies. They are [in fact] allies of one another
What more could Satan want than to deny Jesus and the Crucifixion? I think Satan saw the spread of Christianity and decided, if you can't beat them, join them. He has had a good laugh for 1400 years now.
The visions of Jesus that Muslims are now having are great, and some of the best Christians I know are former Muslims. I hope to see that happen more, but unfortunately, many are becoming Atheist. The Quran has many internal contradictions, but a light of hope is that it also says that Muslims should seek clarification of the Scriptures from "People of the Book", which is what it calls Jews and Christians. The quran is insidiously hard to read because chapters are sorted by SIZE! That is the kind of thing Satan would do to hide the evil. The Imams know the correct order though, and the Quran itself says that the later verses take precedence over the earlier verses. Unfortunately for humanity, the later verses are the most violent and insidious. The Quran is also viewed through the life of Mohammed, who was the most evil person who ever lived. The first half actually came from some Aryan psalms and Nestorian heresies and are not bad. That combination of nice stuff with evil is like a Pedophile who drives a candy truck. Good people can use it for years without realizing the great evil that they are supporting.