All anyone has to do to learn about McCarthy is read the Venona Intercepts and the FOIA FBI file on Owen Lattimore.
As to the charge that Clooney's film is revisionist history, who is surprised by that?
Perhaps it can start another dialogue about McCarthy, and we can once again bitchslap Hollywood.
The release of the Venona documents has proven that McCarthy was absolutely correct. And it has proven beyond any doubt that Alger Hiss was a Soviet agent.
http://www.nsa.gov/venona/index.cfm