Trackers are obsessed with the thrill of hunting their prey. Upon getting a whiff of Bella’s blood, James is sent into a hunting frenzy that can’t be deterred. Even with all the Cullens (except Rosalie) siding with Bella, he welcomes the challenge they pose. Perhaps only death will stop him.
How do you kill a vampire? Author Stephenie Meyer's portrayal makes them virtually indestructible. Garlic, holy water and crosses do no harm. Only another vampire or werewolf can do this job: Tear him up and burn the pieces.