Can you give us a list of all the people McCarthy claimed were Soviet agents working in the government, please?
And also a list of those who he exposed as Soviet agents that history has proven to actually BE Soviet agents?.
Lauchlin Currie
Solomon Adler
V Frank Coe
Cedric Belfrage
T.A. Bisson
Harold Glasser
David Karr
Mary Jane Keeney
Leonard Mins
Franz Newmann
While it's true that each of these are documented Soviet agents, these are only
some of the McCarthy suspects implicated in covert relationships with Soviet intelligence
in the Venona decrypts. As Evans shows, Venona is only a very small part of the story. Many other McCarthy suspects are equally damningly implicated by FBI surveillance, confessions, defectors, the CPUSA archives and the Soviet archives smuggled out by Mitrokhin and Vassiliev.
For example, John Stewart Service is not mentioned in that fraction of the Venona traffic which was intercepted and decrypted, but he was caught red-handed on OSS surveillance delivering the Nationalist Chinese order of battle to the secret Communist Philip Jaffe.
You will have a hard time finding where McCarthy ever accused most of these suspects (or any others) of being Soviet agents. What he generally did was to document a suspect's extensive involvement with Communist fronts, known Communists, and Soviet agents, and that they failed to report such contacts, in violation of the law that required them, as federal officials, to do so.
McCarthy generally argued that such suspects fell under the auspices of the Truman loyalty order (e.g., "sympathetic association with any foreign or domestic organization, association, movement, group or combination of persons, designated by the Attorney General as totalitarian, fascist, communist, or subversive, or as having adopted a policy of advocating or approving the commission of acts of force or violence to deny other persons their rights under the Constitution of the United States, or as seeking to alter the form of government of the United States by unconstitutional means"), and therefore should have been dismissed from the federal office as mandated by that executive order.
The fact that so many of McCarthy's suspects also turned out to be Soviet agents is gravy.