All countries have spies and all fight foreign spies all the time. If you find this fight noble, so be it, but it's not really relevant. McCarthyism was really just a total abuse of power, a witch hunt only several times amplified through the power of modern media. And it destroyed the lives of thousands of people for no reason at all. So sorry, but I don't like it being mentioned in any kind of a positive context. There wasn't any.