All true (some drank poison, some injected, some shot).
Look into the relationship between Dan Mitrione (USAID) Jim Jones.
Church Committee & Ford Commission were bringing heat down on the CIA & their activities within the US. This, along with critical newspaper articles & media coverage at the time, forced Jones to move the Peoples' Temple to Guyana (away from the controversy & outside of congressional oversight).
Leo Ryan was a thorn in the CIA's side for most of his career (big respect). He had co-authored the Hughes-Ryan Act which required extensive notification of all covert operations of the CIA to one or more congressional committees within a set time limit. IIRC, he also had a family friend who had lost his son to the PT. After widespread reports of human rights violations, & being extremely vocal about the lack of congressional oversight of the CIA, Leo Ryan planned to visit Jonestown & is met with resistance from the CIA & State Dept.
IMO, He was 100% set up to be taken out. Jonestown was an USAID/CIA op (widespread accounts of sensory deprivation, torture, punishment beatings, sexual humiliation, brain-washing, etc) & Ryan had been fighting that his entire career (SLA, MKUltra, Vaccaville, DeFreeze, etc). MK Ultra, supposedly terminated, simply moved from Hospitals, prisons & universities to religious cults.