The fables in the Muslim Islamic belief system deny that Jesus Christ is God in the flesh, denial of Christ Jesus is described as ANTICHRIST according to Biblical teaching and prophecy.
1Jn 4:3
And every spirit that confesseth not that Jesus Christ is come in the flesh is not of God: and this is that spirit of antichrist, whereof ye have heard that it should come; and even now already is it in the world.
1Jn 2:22
Who is a liar but he that denieth that Jesus is the Christ? He is antichrist, that denieth the Father and the Son.