Jacob escapes the wrath of his brother Esau, who is naturally very disturbed that Jacob obtained the birthright, even though Jacob is entitled to it.
We all know that there is no fight like a family fight, and there's no family fight like a fight over inheritance. There is something within us that demands our right at all costs. Therefore- Esau sets out to kill his brother, even though history has taught us that in general this type of violence solves nothing (though completely wiping out an evil enemy can be effective).
Rabbi Berel Wein 
