REPORT ON JOHN BIRCH SOCIETY—Based Upon Data in FBI Files (614 pages):
https://archive.org/details/john-birch-society-report-october-2020-614pp/mode/2up
John Birch Society 6-Decade Attack Upon Our Civil Rights Movement
https://archive.org/details/jbs-6-decade-attack-upon-our-civil-rights-movement-and-its-leaders/mode/2up
Racism and the JBS (283 pages)
https://archive.org/details/0906-combined-pdf-racism-and-the-john-birch-society-283-pages/mode/2up
The last link (Racism and the JBS) includes a massive Chronology which shows HUNDREDS of links between the JBS and racial and religious bigots -— and also shows how the JBS promoted racist arguments and stereotypes.