Islam means submission. Muslims submit to Allah and the word of his prophet Mohammad. This means a submission to Sharia Law and the belief that it is Godly to force others to submit by the sword or through social and economic pressure. This belief is grounded deeply in the Koran and supported through centuries of history. It is important to remember that the Koran speaks of solidarity between believers and the condemnation of non-believers which it defines as Christians and Jews. This video produced by Franciscan University with Dr. Hahn and Dr. Regis is a highly interesting panel focused on what Catholics should know about Islam.
Ultimately, we must remember that we are all created in God's image. As Christians we are God's adopted sons and daughters who share in mission of Christ to spread the Good News with all who will listen and engage in dialog with those who will not.