Stew picked the wrong grape during his tradition of becoming a man. So what? It's not as though there wasn't a beautiful young woman distracting him at the time, setting in motion a chain of events that created a plague so virulent and widespread that it wiped out a large portion of his home countries population. And it couldn't have been this that earned him the eye of the literal Guardian of the Dead, who recruits Stew to be his gardener. Not that Stew knows much about gardening anyway. And is it really Patricide, Matricide, Fratricide, Amicicide, and Genocide if it was all by accident? Right? There's no proof. It's not like you'll be able to get at Stew alive anyway.