The JBS did accurately nail Fidel before anyone else did and that’s their claim to fame. Also John Stormer’s None Dare Call It Treason came across as pretty reasonable not some wild-eyed fanaticism; I found it very infuential.
Gary Allen's "None Dare Call It Conspiracy" was on the money when I read it circa 1980, and was a great counterbalance to the what I was being fed in my education and through the media.