Actually he wouldn't have been "put through the legal system the same way Manning was," because Manning was a soldier tried under military law, while Snowden was a civilian contractor.

I don't know which law you are consulting for the definition of "torture," but if solitary confinement is torture then our system hands it out for many people less famous and glamorous than Snowden all the time, without much of any outcry. And this outcry seems to be confined to certain political figures, not just any prisoner caught with a shank.