Yes, I would do whatever I could to stop their suffering, because I am a better person that them.
Yes, because he still a humane being. One should never allow unforgiveness to be a part of one's life. Let kindness be your life's mission. Supposedly Buddha said : Let kindness be your religion. And in the Wiccan Rede it states: An (If, in modern English) it harm none, do what you want. Not helping would harm someone and it is believed in Wicca that Good or Bad (they use bane meaning anything harmful) what you put out will come back to you three fold. I believe that. It doesn't mean from that person but it does mean you will get what you serve to others.