Matt Taibbi called out David Gregory on Thursday while lamenting the media's treatment of Glenn Greenwald.

Taibbi announced Thursday that he is leaving Rolling Stone for First Look Media, Greenwald's new venture with Pierre Omidyar. He joined HuffPost Live to preview his plans and the conversation turned to Greenwald, who has been criticized by some journalists and public officials for working with Edward Snowden and revealing the NSA's secret domestic surveillance programs.

David Gregory, for example, asked Greenwald last June, "To the extent that you have aided and abetted Snowden, even in his current movements, why shouldn't you, Mr. Greenwald, be charged with a crime?"

On Thursday, Taibbi called Gregory's tone towards Greenwald "outrageous."

"I don't know how he can call himself a journalist and talk like that," he said. "Look, this is the job. The job is we're supposed to report the truth. If whistle blowers come forward, we're supposed to take the risk along with those whistleblowers and society long ago decided we should have protections when we do this."

"Modern journalists just don't recognize how serious it is," Taibbi added.

Watch his comments in the clip above and the full interview below.