It is very interesting the view the Muslims have concerning Ishmael....To them he is the one who is the heir not Isaac...Ishmael was the one who was to be sacrificed....His name means "God hears" but also "his hand against everyone and everyone's hand against him"... I cannot remember all that I read about Ishmael but these points stayed with me...I can recommend a book that might help you to understand what the three religions believe about Abraham but I do not know if that is allowed on this site...You can private message me if that is allowed and I will message you back the name of the book...God is good ...all the time....