Genevieve Kineke, author of The Authentic Catholic Woman, did some reading in the Koran as part of her research for a book on women in Muslim cultures, and has written a helpful article on the differences between the Christian and Islamic concepts of God.
The Christian revelation presents God as consistently good and truthful, and worthy of adoration; and it says that God, in some sense, is Love.
The Koranic message does not make these affirmations, and calls not for adoration, but for submission, and asserts above all else that God is powerful.
Two great sites for understanding Islam and its attack on the West are:
http://www.jihadwatch.org/
http://www.thereligionofpeace.com/