The wisdom that comes from heaven is first of all pure; then peace-loving, considerate, submissive, full of mercy and good fruit, impartial and sincere. Peacemakers who sow in peace reap a harvest of righteousness. (James 3:17,18)
Jesus did not come to bring Christianism; Jesus came to transform lives, and then transform others (even societies) through transformed lives.
When we see injustice, we are called to not merely identify it and shout at it; we are called to serve. We are called to follow the example of our Savior and serve, standing up for those who cannot stand for themselves. Giving, and helping, and caring. Not standing idle by clucking our tongues, certainly not standing by in judgment, but stepping in and serving whenever possible.
This is an excerpt of my message 12/7/2014, available in its entirety here.