The late Samuel Blumenfeld had a life long affiliation with The John Birch Society.  From the early Sixties until his death in 2015.  He was a founder of the Jewish Society of Americanists created by Jewish members of the Society.  Camp Constitution archived the organizations newsletters and other works.  Here is a link to the archives: http://blumenfeld.campconstitution.net/  The Jewish Society of Americanists is under "Affiliations."  Sam was also a founder of "American Friends of Katanga" and the archives contains correspondence between Sam and Dr. Moise Tsombe.