Steinglass thinks that the American public has grown cold-hearted:

In 2004, Americans reacted with shock and horror to the news that soldiers were torturing and killing captives in Iraq and Afghanistan. The stories dominated the headlines for months, and engendered a dismally predictable and virulent reaction seeking to justify or explain away the torture and murders. Six years later, the Bravo Company death squad story has scarcely been picked up by other media organs. Apart from Spencer Ackerman, the blogosphere has been largely silent. We've accepted the fact that American soldiers are committing atrocities, and we don't want to think about them anymore.