"I will fight you till I lose everything!"
That is the business of bringing down the other man. Until he has felt the same mockery and loss of dignity the battle will never cease. He will feel your hatred so make sure it is apparent that a war is brewing.
Justify your own cause for it will bring you happiness, and doubt his reasoning for it will give you strength.
Point out his flaws and exaggerate to others why he is such a dog. You know what he does to be agreeable.Let it be known how he is the self righteous idiot.
To demean his intelligence privately can be quite the sport, but to do it in public can be the spectacle of your day.
Lie and cheat to protect your own esteem and act and fake the hero to become your own enemy.
For who do you think you were fighting anyway?