I have read and studied two pages of this per day. I have also read background information. Mohammed was a warrior against idolatry and unbelief. He was familiar with the Old Testament. Like the Old Testament prophets, he revered a mighty God.
His main message is that unbelievers and those who cry lies are doomed to the fires of Gehenna. Believers, the faithful, will do good deeds, pray, and inherit edenic paradise. His followers called him "THE PROPHET," indicating a standing greater than all those prophets who preceded him. When Jews and Christians did NOT accept him as a prophet, he turned against them.
The powerful and frightening side of God was well known to Mohammed. Unfortunately, the loving side of God, as seen in Jesus, was not familiar to him. He recognized Jesus as a prophet, but not as the only begotten son of God. As a result, Islam is a religion similar to Judaism in preaching good works and godly routines as the way of salvation. Neither salvation by faith that Jesus died on the cross for our sins nor acceptance of Jesus as Lord and Savior is a tenet of Islam.
As a Christian, I honor Mohammed as a great warrior against the godless and the ungodly. The Koran repeated this message over and over again. Unfortunately, it seriously lacks the depth and variety of the Old Testament. It does not begin to express the depth and breadth of the love of God as expressed in the New Testament. I am grieved that Mohammed did not see the incredible beauty of Christ. I am grieved that Mohammed did not see that Jesus was more than a prophet. I am grieved that Mohammed failed to appreciate the awesome, life-changing message of the New Testament.