Stockhausen’s statement is itself a work of art. It shares in the classic strategy of seeing something in another way…Andre Serrano’s PissChrist, or Les Levine’s Blame God.
I would say that the emotion at the end was a result of Kelley mining around in very potent unconscious feelings of loss, despair and the anguish. He does this via the Popeye cartoon, but it speaks to personal emotional realities in his own mind.