In other words, he was bonkers and made an arse of himself. Nevertheless, the ridiculous dog and pony show soured people against that kind of witch-hunt and, as I said, it therefore became outre to call someone or something a communist or communistic. So we have "gentler" words now. However, these "gentler" words do not change the essense of their intent, and do not alarm people as much as the raw word "communist" does.
One can call himself a "socialist" or a "progressive" in polite company in these days, but if one calls himself a "communist" people still blanch and faint and go "on guard."
What McCarthy's antics did, ultimately, was move the "communist" descriptor, with its high semantic loading, out of the language and substituted less-loaded, but equally dangerous terms -which do not cause the postulated "polite company" to go on guard.
This of course begs the question as to whether diverse political views should be suprressed, even if they are "communistic," but in the tenor of the times, "communism" was considered a legitimate threat to the United States.
I agree with you that, in those times, he should have turned over any genuine evidence to enforcement authorities, but he was, like so many of our present politicians, a "career" politician, and, though he was probably bonkers, he also had his eye on the votes publicity could bring. Remember, I said "overboard / bonkers / nutso over Communism in the country."
I could be wrong, but I still think if there had been no McCarthy screwing things up and making his investigation of Communists in the government machinery (and other places) a dog and pony show, we would not have as many "progressives" and "socialists" in our country today.
Terry, 230RN