Are you challenging the fact that the U.S.S.R. had extensive espionage networks in the U.S. during the 1950s, including the Rosenbergs who were in fact guilty of spying for the Soviet Union?

McCarthysim per se was horrible, but the fact remains that the Red Scare was grounded in historical truth.

https://www.amazon.com/Venona-Decoding-Espionage-America-Com...

https://en.wikipedia.org/wiki/Julius_and_Ethel_Rosenberg