Rules and fair play are for close friends and allies.
The enemy will try to convince you that you need to hold the “moral high ground’’. That you cannot be the one to initiate. You must always be the one reacting!
And keep to the rules of the game. Don’t take cheap shots even though your enemy will surely take the cheapest of shots on you.
But this is my chance, is it not? Now that the enemy has shown himself to be a hypocrite I will grind him to dust with social shaming and ostracizing!
The enemy does not care for principles. The enemy is merely faking it, pretending to have principles to better fuck you over. Fuck you over royally.
You don’t owe your enemy anything except the fury of your spirit blessed by your ancestors.
Take the fight to them. No more Mr. Nice-Guy.