Wanting someone to die is not a crime. Taking actions which perhaps make you feel better that you might convince yourself is in some way leading to their death but do not directly do so is not a crime.
My first wife's mother was shouting at her mom "Mom, I wish you would just die!" when her mother sufered a heart attack and did in fact die. Should we prosecute that woman for wishing her mother would die and causing her emotional stress? The question is absurd aside- we do not prosecute people for bad thoughts.