Jim Jones, leader of the Peoples Temple and architect of the Jonestown massacre, was infamously paranoid about the FBI and CIA, regarding them as an existential threat to his "revolutionary" congregation. This paranoia was likely a contributing factor to his decision to relocate the Peoples Temple to Guyana, to create a safe haven from their imagined hostility.
But what if he had decided that there truly was no safe place ( save perhaps for the USSR, which he apparently admired) and had instead decided to attack the enemy in their lair, in a grand act of revolutionary defiance. Lets assume that the death toll at both headquarters is similar to that of the Oklahoma City bombing, and that a defector from Peoples Temple reveals who was responsible for the attacks. Two questions come to mind.
First, what does this does this do to the alternative religion scene in America. Do they all become viewed as potential terrorist cells, and end up suffering FBI/CIA surveillance and infiltration of the kind Peoples Temple never experienced? In particular, do the Rajneeshees suffer a sharp loss of membership, butterflying the Rajneeshpuram settlement in Oregon? Perhaps even religious fervor in general will now arouse the suspicion of the intelligence agencies, being seen as a stepping stone to radicalism.
Second, what happens to the political careers of those Democratic notables that had contact with Jones. Angela Davis, Jerry Brown, and even Jimmy Carter's wife Rosalyn all had nice things to say about him. Jerry Brown's political comeback seems very unlikely if he becomes linked in the public conscience with a terrorist.