The 'kill the Buddha' comment must be interpreted within the context of the nondual realization espoused by Zen Buddhism. Buddha-nature transcends categories, making room for a world of distinct objects that are also empty of inherent existence. Indeed, from the point of view of Buddha (awakeness) there is no inside or outside - only a creative display infused with unborn awareness. Within the rubric of Zen practice it is impossible to see the Buddha. It is possible to see things that have a 'buddha' signifier attached to them from the conventional point of view, but this would not be construed as an enlightenment experience. Your basic nature is Buddha, neither inside nor outside.