For how long? Of course he deserves some punishment for breaking his oath, but how much is fair?
Life in prison is not fair. Also what is with the stories of torture? No matter what he could have done, that should not happen.
Let's watch it play out in court.
He disseminated classified information and gave intel to our countries enemies. That's more than breaking an oath, that's treason.
He knew what the consequences of betraying his country were (particularly being in the military), and now he was to pay those consequences.
It's only treason if people died as a result. Did people die as a result?
Otherwise I don't see how it's worse than what Robert Hanssen did, or Aldrich Ames. What Aldrich Ames did was treason.