I am a social justice christian for many reasons.But, primarily because I follow Jesus who said He came to bring good news to the poor.
We are to follow in His footsteps.....
Defend the cause of the weak and fatherless; maintain the rights of the poor and oppressed.
He has showed you, O man, what is good. And what does the LORD require of you? To act justly and to love mercy and to walk humbly with your God.