It's been said that one person's freedom fighter is another's terrorist. > The files she copied also included about 250,000 diplomatic cables from American embassies around the world showing sensitive deals and conversations, dossiers detailing intelligence assessments of Guantánamo detainees held without trial, and a video of an American helicopter attack in Baghdad in two Reuters journalists were killed, among othe…
http://www.newyorker.com/magazine/2016/12/19/daniel-ellsberg...
Long story short - leaks are a desirable thing for the executive branch, but there is a "right" way to do them. Snowden and Manning did them the "wrong" way, and it's implied that that is one of the reasons they both had the book thrown at them.