Yes, he is not a Christian, and is heavy into vengeance. This is the norm for human action for thousands of years. Most of the world today acts on the same motives.
Read the ancient sagas, from the Iliad and Odyssey to the Norse sagas, and Germanic Operas. Vengeance is a powerful human motivator.
You are one of few who understand his motive and the fact he is not crazy. I think it's easy for people to dismiss this with “he's crazy, he's a nut case”, etc., rather than try to understand what is really going on with him. I am a psychological examiner and know this man is not crazy but most on here talking about him, don't believe me - again, it's easier to fluff it off as “he's nuts”.