A decoy. The Jim Jones conspiracy-conspiracies exist for the same reason the Kennedy ones do: to throw people off the trail. Jim Jones was simply a Christianity-hating communist. His cult wasn’t even a religion; it was an anti-religion commune.
The link I gave you is very well researched.
It discusses Jones early visits to Brazil where he was absolutely funded by the CIA.
In the post Church Committee environment the CIA hid its ongoing mind-control projects in various ways—the Jones gambit was one of them.
Follow the money....