Manning =/= Whistleblower
Manning == Military Criminal
That would be true if it could be proven that all those documents had been read by Manning and he considered them dangerous. Unfortunately, since there were over 750,000 documents, and each would take a couple minutes to digest as to if it was dangerous or criminal, he would have needed over 400 days of constant reading during his On Duty time to read all of them, and that is plainly impossible for him to have accomplished.
So he gave unread documents to a foriegn national.
Except 99.999% of all soldiers have no issues with UCMJ. I surely never did. The only ones that I did know who had issues were drug users and wife beaters.
Personnally I'd encourage anyone with Authority issues not to go into the military, unless you Want that to be broken out of you. Harsh treatment is what the military offers and what people sign up for when they put their sig on those enlistment papers.