NAS WRITES ANGRY LETTER TO L.A. Reid & Def Jam!!! NAS goes in hard on DEF JAM!!! XXL has confirmed the letter as absolutely authentic. For some reason, DEF JAM is refusing to promote this album properly or even count it as part of NAS's contractual agreement. NAS accuses the executives of thinking that they are the Stars, rather than the Artists. Personally, I have preached time and time again that the industry are ran by the Executives who really don't care about the music OR the messages…