The tweet in the post is not quite correct. The manual is CIA (strictly, OSS) and intended as a sourcebook for operatives to share ideas with people under (Axis) occupation. To frame it as "CIA vs activist groups" isnt really right and adds baggage where there need be done.
Original link:
https://www.cia.gov/static/5c875f3ec660e092cf893f60b4a288df/...