Beck made the statement Friday on his radio program while interviewing NSA whistleblower William Binney.
Binney worked at the National Security Agency for nearly four decades, and said the secret surveillance of Americans began in October 2001.
He believes the NSA is storing information on 3 billion phone calls every day.
“I’m telling you, America,” Beck cautioned, “If we don’t stop this right now, we will be remembered as the most evil nation in history of the world. We will dwarf what Germany did. And I’d say that if Mitt Romney were in office and this were happening. I would be saying exactly the same thing.”