I think some perspective is in order.
Bradley Manning while enlisted in the military leaked classified military secrets, which is a serious crime in the military. The Uniform Code of Military Justice is much more strict than civilian law.
Just a few decades ago the same offense he committed would likely have seen him tortured and executed in short order. During the height of the cold war or before I doubt he would have been sitting idly in a prison cell for months or years. I think that shows how far we have come as a society that he is still alive and has been pretty much unharmed. Although, he will probably end up getting a lengthy prison sentence, possibly life in prison, he could be much worse off.
One thing that article left out is that he's threatened suicide numerous times. Being on suicide watch in a military prison is no picnic. I would expect his living conditions to be quite bad. The 'forced nudity' thing sounds terrible, but in context of a suicidal inmate, you can't very well have them trying to hang themselves with their pants legs.
Also, I don't know if I'm recalling it correctly, but I vaguely remember reading something about some of the information he leaked included the names of undercover operatives and local allies in Afghanistan. I can't remember if any of them were killed as a result of their names being made public or if they were able to be pulled out beforehand, but that seemed to be the justification for the 'aiding the enemy' charges. I would have expected the same types of charges to be laid on anyone who outed the names of our Russian spies during the cold war.