Have you seen this article?
Insider Report: Obama Administration Intends to Unionize U.S. Military with Executive Order
According to the insider interview, the motive for the move is to ensure that U.S. military personnel are justly represented.
I thought that in light of your posting this article you may be interested in the other.
That link/tread you posted has been pulled. Perhaps due to lack of validity.
I have not heard anything about Obama attempts to unionize the military, and believe I would have due to contacts I have with folks who are up in front on military issues.