Huffpo: Bradley Manning, Hero, or Traitor?
Short answer: Hero

Besides helping to end the Iraq war, the leaked cables helped spark the Arab Spring. When people in Tunisia read cables revealing corruption by the ruling family there, they took to the streets.

If Manning did what he is accused of doing, he should not be tried as a criminal. He should be hailed as a national hero, much like Daniel Ellsberg, whose release of the Pentagon Papers helped to expose the government’s lies and end the Vietnam War.