His actions as a whistleblower, sure. The way he did it? Absolutely not. Instead of running away like a coward and publicizing that he was releasing the documents, he could have anonymously sent them to a news organization (as we see with recent cases involving reporters from both Fox and CNN, reporters will not reveal their sources, and they can't be forced to).
To be honest, he has always seemed to me like he wanted his 15 minutes of fame, and then it backfired and he had to flee, so now he's playing the martyr card.