Without him, all of the quoted effects would not have happened, right? It actually took his direct action to catalyze those events into the stated negative outc

Without him, all of the quoted effects would not have happened, right? It actually took his direct action to catalyze those events into the stated negative outcomes. So how is it not at least partially (though actually mostly) his fault? If someone kills someone else, do you blame the murderer's mom for his existence, or Walmart for selling the knife, or do you blame the murderer for doing the stabbing?