

Paul is responsible, this is his goal. He used the tools that the Bene Guesserit instiled into the culture to make him a savior and justified his revenge jihad.
The BG didn’t want this, IIRC, nobodies really know what the plan is when the Quizatz Hadderach will happen. Probably that he will become emperor and prepare everyone for a time of peace, however there’s, in the books, something lurking at the edge of the Galaxy. The BG know this and other factions too





















Lac Ontario