"it was revealed many years later that pretty much every single Communist-leaning organization in the US had been receiving funds from Moscow"
This claim needs a bit of elaboration, especially since people have called everything from SDS to the Mattachine Society to SCSC to the Black Panthers to the Union of Concerned Scientists to Greenpeace to the Campaign for Nuclear Disarmament "Communist-leaning."
The broader point is true: McCarthy in his factual assessment that many US institutions, including parts of the government, were infiltrated by agents of and at least in some respects directed from Moscow, was right, although his overall package was very much broken.
This claim needs a bit of elaboration, especially since people have called everything from SDS to the Mattachine Society to SCSC to the Black Panthers to the Union of Concerned Scientists to Greenpeace to the Campaign for Nuclear Disarmament "Communist-leaning."
The broader point is true: McCarthy in his factual assessment that many US institutions, including parts of the government, were infiltrated by agents of and at least in some respects directed from Moscow, was right, although his overall package was very much broken.