Hostage stories

Ali from Free Iraqi brings another look at the hostage story, which as you all know has been all over the place. But I still have my doubts, and I am not convinced yet as to what's going on. For one Ali's theory does not seem to close all the loops, like the ones brought by this story linked by Fayrouz. Why would the Sunni/Shi'a alliance give up their car bomb factories, and munitions dumps?