You're referring to this document [1] which has been declassified in 2017 [2] but this 2025 release comes up with some redaction removed - but essentially not providing more information. There's nothing interesting. The document opens up with a quote from a magazine (which people are mistaking for a statement of a document itself) and then goes over into detail of the work that guy has been doing - which is pretty mild. The whole document seems to fact-check the quoted magazine.
[1] https://www.archives.gov/files/research/jfk/releases/104-101...
[2] https://www.archives.gov/research/jfk/release-2017-2018?sear...