Elf said:
Because they are deceived. Their father the devil has blinded their eyes.
Elf said:
Your play on words does not prove anything. Read scripture, since it refers to and will answer your question.
Elf, Youre right. Word games dont really prove anything. Lets read the scripture.
Now...you say that muslims have been blinded by the devil. First, lets see what the Koran has to say about the devil.
O men! eat the lawful and good things out of what is in the earth, and do not follow the footsteps of the Shaitan; surely he is your open enemy.
-2:168
Looks like a warning against Satan. Now, just why would those blinded by the devil (as you say) have a warning against the devil?
Anyway...let us see what Jesus has to say when he was accused of being possessed....
So Jesus called them and spoke to them in parables: "How can Satan drive out Satan? If a kingdom is divided against itself, that kingdom cannot stand. If a house is divided against itself, that house cannot stand. And if Satan opposes himself and is divided, he cannot stand; his end has come.
-Mark 3:22-26
According to scripture, which you suggested be read, Jesus teaches that Satan would not oppose himself...and it looks like Satan is being opposed in the Koran. So, if you believe that Jesus is correct, then the beliefs of Islam are not from Satan, because Satan would not oppose himself.