The story sounds strange. As if Hitler would speak with that Mufti. Or take advice from him.
Though what might be true is that there were jewish religious extremists that thought a biblical prophecy has to be fullfilled in order to give the jews their own land. See the fifth paragraph here:
http://www.trumpetsounds.com/howawful.html (No, i did not really check if the website is political correct, only wanted a reference.)
Though that Hitler takes advices from jews and that he wanted to help the Mufti so that jews don't go to palestine is simply stupid.
Hitler had plans of deportation though first.