Personally, I think what he did was childish and dishonorable. The fact that he ran away afterward and has shown no concern about the lack of freedom in the places he has chosen to run simply supports my first impression. If he did it for the principle, then he should stand up for his principle. Instead, what he did was violate his oath and throw a tantrum.
I am not aware of any beneficial
personal motive for what Snowden did, so I can only assume he was motivated by resentment of what he witnessed while working at the NSA, actions and procedures which he has described as systematic violation of citizens' Constitutional privacy protections. If this was in fact his only motivation it is clear that what he did was a form of rebellion committed on your behalf and mine. Can you suggest another motive for what Snowden did?
If you can't understand why he is evading arrest for his action, anticipation of the the Bradley Manning example seems to me a good reason. Confinement to an 8 x/11 cell with bright white walls and ceiling, nothing but a steel cot, a toilet and a sink, nothing else, no tv, no radio, nothing to read, not even a pencil and paper to write with. Fluorescent lighted 24 hours. One hour a day in an equally barren courtyard for "exercise." Imagine experiencing that month after month, possibly for years. They call it "suidide prevention" but it is in fact
torture by any rational standard!
Having no evidence of a personally beneficial motive for what he did I cannot condemn Snowden's action. Unless he is insane it would seem he did it for reasons which are best described as patriotic resentment of government excess. And in view of the foregoing description, can you really fault him for evading arrest?