McCarthy identified several agents actively engaged in espionage. KGB records identify hundreds more that he missed.
McCarthy identified many more people in sensitive positions who were security risks, many with Communist associations. Even if those people were not actively engaged in espionage, they should not have held sensitive positions.
KGB/NKVD archives reveal they had hundreds of agents in the executive branch in the 1940s. McCarthy spurred the removal of Soviet moles, Communist sympathizers, and other security risks from sensitive positions. In this, he did the US a great service, as regrettable as false accusations are.
Edit: In response to your questions, it's as if you didn't read what I just wrote. Regarding the Soviet records of infiltration, several books have been written on these records and their revelations.
McCarthy identified many more people in sensitive positions who were security risks, many with Communist associations. Even if those people were not actively engaged in espionage, they should not have held sensitive positions.
KGB/NKVD archives reveal they had hundreds of agents in the executive branch in the 1940s. McCarthy spurred the removal of Soviet moles, Communist sympathizers, and other security risks from sensitive positions. In this, he did the US a great service, as regrettable as false accusations are.
Edit: In response to your questions, it's as if you didn't read what I just wrote. Regarding the Soviet records of infiltration, several books have been written on these records and their revelations.