Although Manning leaked highly sensitive military documents that provide information that could put the country in danger, it is important that the Whistleblower Protection Act be upheld so that other whistleblowers do not become scared of the consequences. In a time when our military was acting rashly, it is the right of every citizen to know what's really going on in their country.
His actions could have easily escalated the war as well as cause countries that were neutral to turn against us. He claims his purpose was to show the abuse of military power in the Middle East. What he didn't understand was that his posts on WikiLeaks and various websites inadvertently told enemy factions where the U.S. troops were mobile at.