I don't know if this has been brought up, but this gal in the video who has been studying Q, connects the KEYSTONE with Operation RUSTY. I'm still reading more about it while workfagging, but I think it's worth digging into.
https: //youtu.be/yO6MA9k3Q8U
A couple of her links:
CIA NAZI WAR CRIMINALS: https://nsarchive2.gwu.edu/NSAEBB/NSAEBB146/index.htm
Operation RUSTY: https://www.cia.gov/library/readingroom/docs/CIA%20AND%20NAZI%20WAR%20CRIM.%20AND%20COL.%20CHAP.%201-10,%20DRAFT%20WORKING%20PAPER_0010.pdf