An important distinction between Jesus of Nazareth and Muhammed needs to be made: Jesus never commanded his followers to kill anyone. Muhammed did, plain and simple. Vast difference.
That one distinction alone moves Muhammed from the path of God to the path of Satan.
I would also be remiss at this point not to call to everyone's attention to the sign that Jesus asked others to heed: Jesus died, was buried, and in 3 days rose again. Muhammed was not a sacrifice for sin, Jesus was. As long as I am on a roll... Jesus died for Muhammed's sins, too.
Unless 'Muhammed' repented, and threw himself down at God's mercy - 'believing on' Lord Jesus as his saviour - Muhammed died in his sins. We don't wish this on anyone:
Where their worm dieth not, and the fire is not quenched.