Time permitting, go read Laurie Penny's brief but powerful piece in New Statesman which says in part:
The case isn’t just about whistle-blowing. It’s not even just about freedom of speech. This is about secrets, and who gets to have them, and from whom, and at what cost. As a gay soldier in an army in which being honest about your sexuality could get you fired, assaulted or both, Manning understood the tyranny of secrets on a personal as well as a political level. This was something made clear in the chat logs between Manning and Adrian Lamo, the hacker who turned him in. This is about information and who gets to hoard it. There are a great many people, not just in the military, who believe that states and institutions operate best by keeping swaths of the population ignorant of their workings. There are a great many people, not just in the US, who are suspicious of unsupervised information exchange, of mass higher education and of the internet. Right now, Manning is only the most high-profile of a large number of “hacktivists” and “crackers” being persecuted for sharing information they weren’t supposed to have. Andrew “Weev” Auernheimer, in prison for hacking the telecoms firm AT&T, is one. Aaron Swartz, who took his own life in January while facing prosecution for downloading millions of subscription-only academic journals, was another.