1. The character is a vigilante. He becomes increasingly more insane and violent. He certainly isn't a victim.
The point here is that you would not want to get into a confrontation with someone like that.
2. The verb is "prayed," not "prayered."
It means that God ("Heaven") will have to help the person who gets in my way. Because I won't help him, I will be going all Travis Bickel on the person.