I think perhaps you’re mixing up your talking points, which are to defend McCarthy when Julius and Ethel Rosenberg come up, since the archives show Julius was guilty. They also show Ethel was innocent, and was at worst aware but uninvolved. A 50/50 rate of guilt for people being executed doesn’t exactly seem to make anything right. Since the FBI’s investigations were hampered by McCarthy’s interference in the case, McCarthy’s even less right.
Alternately you’re really saying the cables show that Hollywood, the HUAC witch hunt’s main focus, was under the sway of Soviets, which is something I’d be interested to hear more about since I have yet to read about Soviet archives proving this.
