Why does abner burn Barnes in barn burning?

Abner shows some strange respect for fire because it is his weapon of choice like a sWord or gun for other men. Not only does he burn down barns with this weapon, but he also seems to have an infatuation with fire as a delicacy, though he does waste it from time to time. Abner tends to feel that other men, often the ones he works for, are better than him, so he burns down their barn in order to get even with them. It's sort of his passive aggressive attempt at making himself a better man by making others worth less.