I don't know what butlerian is
Let me cite some fragments from "God Emperor of Dune":
"A well-maintained machine can be more reliable than a human servant," Leto said. "We can trust machines not to indulge in emotional distractions."
Luyseyal found her voice. "Does this mean you intend to remove the Butlerian prohibition against abominable machines?"
"I swear to you," Leto said, speaking in his icy voice of disdain, "that if you display further such stupidity, I will have you publicly executed. I am not your Oracle!"
He could see both women absorbing the multi-pronged thrust of his words, weighing the possible meanings and intents. Was the God Emperor distracting them, focusing their attention on the lxians while he maneuvered elsewhere? Was he telling the Bene Gesserit that the time had come to choose sides against the lxians? Was it possible his words had no more than their surface motivations? Whatever his reasons, they could not be ignored. He was undoubtedly the most devious creature the universe had ever spawned.Leto scowled at Luyseyal, knowing he could only add to their confusion. "I point out to you, Marcus Claire Luyseyal, a lesson from past over-machined societies which you appear not to have learned. The devices themselves condition the users to employ each other the way they employ machines."
"The lxians contemplated making a weapon-a type of hunter-seeker, self-propelled death with a machine mind. It was to be designed as a self improving thing which would seek out life and reduce that life to its inorganic matter."
"I have not heard of this thing, Lord."
"I know that. The lxians do not recognize that machine makers always run the risk of becoming totally machine. This is ultimate sterility. Machines always fail... given time. And when these machines failed there would be nothing left, no life at all."
"I do not understand your reference to the Butlerian Jihad, Lord, Machines that think have no place in..."
"The target of the Jihad was a machine-attitude as much as the machines," Leto said. "Humans had set those machines to usurp our sense of beauty, our necessary selfdom out of which we make living judgments. Naturally, the machines were destroyed."