Hitchcock wasn't just opposed to method acting, he actually believed that great actors were great because they did exactly the opposite. "The chief requisite for an actor is the ability to do nothing well, which is by no means as easy as it sounds," Hitchcock said in his interview with Truffaut. The director thought that an actor's chief responsibility was to be compelling without doing much at all. They should be interesting to audiences not because of their actions, but because of something innate inside of them.
In Hitchcock's view, actors were supposed to be one with the rest of the elements in the frame of a movie. The only difference between an actor and a prop is that most props can't move on their own. The movie stars that Hitchcock worked with most, including people like Cary Grant, Ingrid Bergman and Jimmy Stewart, were good at turning small gestures and moments into seismic events. They could do nothing, and still be utterly captivating on screen.