Whistleblowers and War Crimes

On 22 October the WikiLeaks site released nearly 400,000 documents ("SIGACTs," "significant actions) that document the US forces in Iraq between 2004 and 2009. The US government doesn't dispute the information contained in them, but will likely seek to prosecute whoever leaked these documents. What's maybe most surprising to me is how little reaction the American public has had to this information. Why isn't this a bigger deal, either as inspiration to an antiwar movement, or in the form of outrage over the leaks themselves?