Shlomo sand and the torah from 4 sources?

a common argument Raised by muslims is the Outdated Theory that the torah has come from 4 sources.

first this theory is outdated among the Scholarly Community,but recently i have seen muslims use it.


let us see the implications if this were True:

first,if true ,this would  not only  prove torah to be False,it wouldn''t confirm islam either,because both of us believe in the Exodus,conquest of canaan,and torah given to moses.Shlomo Sand denies all of this.



Second if true ,all the References to jews in the quran in the times of the prophets (5 :44),would be false,thus both religions would be dfalse.\


i hope muslims Think before applying atheist theories.

for a Refutation to these theories see :




http://www.christianthinktank.com/qmomoz.html

http://www.christianthinktank.com/qmoses1.html