Sin cannot exist in the light of truth. So developing truth about sin ends the sin. Ending the sin is justice. What that means is that producing justice through direct action is much more limited than producing justice through truth. However, the concepts are inseparable.
Some direct action is one of the most effective means of producing truth about injustices.
In the world, the social activists often talk about empowering the powerless. Small amounts of power are needed for everything. But as a goal, power is quite corrupted. Power is the ability to bowl them over. So corrupted persons, with satan behind them, take over sources of power and use them to perpetrate injustices.