This article outlines a number of accounts of Manley's treatment and Andrew describes it somewhat kindly as Sadism. I would call it Torture.
From his lawyer:
The decision to strip PFC Manning of his clothing every night for an indefinite period of time is clearly punitive in nature. There is no mental health justification for the decision. There is no basis in logic for this decision. PFC Manning is under 24 hour surveillance, with guards never being more than a few feet away from his cell. PFC Manning is permitted to have his underwear and clothing during the day, with no apparent concern that he will harm himself during this time period. Moreover, if Brig officials were genuinely concerned about PFC Manning using either his underwear or flip-flops to harm himself (despite the recommendation of the Brig's psychiatrist) they could undoubtedly provide him with clothing that would not, in their view, present a risk of self-harm. Indeed, Brig officials have provided him other items such as tear-resistant blankets and a mattress with a built-in pillow due to their purported concerns.
More links in the article to Glen Greenwald's articles on this disgraceful subject. As Andrew states, Bush torture and lies continue under Obama.