Hmmm ... my take on this ker-faux-fle is that some one baited Libs & progs to demonstrate how credulous they are and many - including many at DU - bit and swallowed the hook.
And the funny thing is, few who took the bait will think past "moving on" to reflect on their credulity and how it makes them susceptible to faux exposes' like this or Rather-Mapes' Memogate.