I would point you to two books, which I think will be helpful in understanding where Islam is today and where they came from.
The Politically Incorrect Guide to Islam and the Crusades
The Truth about Muhammad
Both of these books are by Robert Spencer and may be acquired at http://jihadwatch.org or at a local bookstore.
The Islamic faith is made up of many fanatics and extremists who wish to convert or enslave all infidels (people who do not believe Muhammad is a prophet or worship Allah). The Allah of Islam is not the Jehovah of the Bible. Muslims worship one God with one person, whereas Christians worship the one and only God in three persons: the Father, the Son, and the Holy Spirit.
While Muslims believe Jesus is a prophet, they deny that he is the Son of God, that he died for our sins, and that he arose from the dead. They believe the Bible is corrupt. They do not believe the gospel (Mk. 16:15-16).
Their desire is to establish a Caliphate over the whole world. Those who do not convert will be enslaved in dhimmitude or killed. They want the pot of gold, which is America.
This is their desire.