Exactly Suna,
Muslims fully believe that Jesus was Christ, and to deny that makes someone outside of Islam. Muslims also believe that Jesus will come back at the end of time. We just dont think that God has children, or that God was a man, or that there are many gods or goddesses.
I remember reading a verse somewhere...maybe it was the later chapters of Genesis or Exodus, but God tells Moses "No man hath seen the face of God and lived." How then by all that is rational and logical and sensible, can God have made himself into the Human flesh. And I know "with God all things are possible." But it doesnt mean that they all come to pass.