So saying publicly and proving that USA kills and tortures people undermines your freedom?
So what? Did anything happen thanks to that?
He stole and released critical intelligence that could result in harming diplomatic relations, and put American soldiers lives at risk during wartime (which is aiding and abetting the enemy). He intentionally violated the Espionage Act, and as someone with a security clearance, he knew the risks. Violation of the Espionage Act carries with it a penalty of death.
If he was unprepared to accept those consequences, he should've kept his treasonous mouth shut.
Wait, wait, wait. Full stop.
What WAR? The United States is not at war. Yes, they are actively murdering people in foreign lands, but ONLY Congress can declare war. Wartime rules DO NOT apply to this case absent that declaration.
If you deny this, then you are saying the Constitution is invalid (as opposed to useless, which it demonstrably is.). If you say the Constitution is VALID, then EVERY SINGLE BELLIGERENT ACT committed by the United States since 1945 has been demonstrably illegal. If you deny THIS, then you are back to the first part. A lawless government has no validity. Either the Constitution says what it means, or it means nothing.
In order to prove treason, even absent the above, you would have to demonstrate SUBSTANTIALLY that Manning gave aid and comfort to the enemy, since he in fact did the very opposite of making war against the States in pointing out to their alleged citizens that the people in charge were engaging in criminal activity under the color of law. Whistleblowers are not traitors. I would argue that they are patriots.
I again refer you to Thomas Jefferson. Since you've already outed yourself as a Tory sympathizer, you probably don't care.