After thinking on it a little more, he obviously wants to challange Obama's legitimacy in court in the form of a court martial. What he's not realizing is that it won't ever get to a court martial stage or if it does, the members will refuse to consider that a valid defense. Considering if he gets dishonorably discharged (probably the most likely outcome), he won't have any hope of getting his pension and may end up doing prison time, I would say he has a great deal to lose if it blows up on him.
However, never say never, he could get the right people on the board for his CM and actually challenge Obama. I'd call those some mighty long odds though.