John Birchers were not far from the truth, but were generally attacked for their "packaging".
Ann Coulter had a book out a few years ago about how Senator McCarthy was right, but again - the "packaging" was a problem (easily attacked).
That Coulter book about McCarthy was a great read. She basically took a book by another guy, I can’t remember his name, a much longer and drier and more scholarly book — I have a copy but haven’t read it yet — and distilled it down to the most interesting parts all wrapped up in her biting style.