The Buddha said that it’s better to focus on the battles inside, battles over your own defilements, greed, aversion, and delusion. Those are the battles that can be won, and when you win, you don’t create any bad kamma.

"There are things we may want out of other people that they don’t want to give, like respect, acknowledgment of our existence, or acknowledgment of our worth as a person. Then you have to ask yourself, “Is it really worth fighting for? What does the fighting accomplish? Is it going to gain any respect? And even if it does, how much is that respect worth?”

There are so many battles in the world that just lead to bad kamma even when you win, sometimes especially when you win. Look at the history of the world when nations that won battles ended up being transformed into the enemy, taking on the enemy’s characteristics. Is this what you want? At the same time, when you win a battle, you gain the animosity of those who lost.

This is why the Buddha said that it’s better to focus on the battles inside, battles over your own defilements, greed, aversion, and delusion. Those are the battles that can be won, and when you win, you don’t create any bad kamma. As for whether the people outside will acknowledge your victory, that doesn’t really matter. In fact, as Ajaan Lee once said, “Things that other people know about aren’t safe. You know for yourself; nobody else has to know.”"

~ Thanissaro Bhikkhu "A Victory that Matters" (Meditations6)