Guardian columnist Glenn Greenwald on Wednesday night ripped into Rep. Peter King (R-NY) and pointed out the congressman’s support of the Irish Republican Army (IRA).

Greenwald told CNN’s Anderson Cooper that it was “staggering” to see King call for him to face criminal charges for reporting on secret information about the National Security Agency’s surveillance program.

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“It’s bad enough to call for that, it is extraordinarily menacing that he did so based on a complete falsehood, the idea that I ever threatened to [disclose CIA agents],” he said.

Greenwald said he had no idea why King was making the false accusation.

“The last thing I would try to do is read what goes on internally in the swamp of Peter King’s brain,” he remarked. “What I do know is that he has a history of all kinds of radical and extremist statements. He himself was a supporter of terrorism for several decades when it was done by the IRA.”

King has increasingly elevated his rhetoric. On Monday, he called for NSA whistleblower Edward Snowden to be extradited to the United States and prosecuted. On Tuesday, he said that journalists who reported on leaked government information should also be prosecuted. On Wednesday, he said that Greenwald in particular should be arrested and prosecuted.

Watch video, uploaded to YouTube, below: