All Christians should support and believe in social justice. Just because it has been hijacked by so many in order to advance their political agenda does not mean legitimate social justice should be rejected.
True social justice has its foundation in the sanctity of life and the dignity of the human person. It rests its truths on He who is Truth, Jesus Christ our Lord. The care of the poor, the protection of the family and fairness to those who labor are not radically dangerous ideas. They are what build a just and prosperous society. Acts of Christian charity should advance these goals.
The conflict is when people believe it is solely the duty of government to take care of others. Government can help by having policies that do not hinder the charity of others and which help build strong families.
A government that supports abortion has already failed in that goal. A government that has jettisoned the true meaning of marriage has bastardized that goal. A government that encourages sloth instead of honest labor has shown they value a type of slavery above the true dignity of free men and women.
I get so tired of people criticizing the Church for believing in social justice. Criticize instead those who have twisted the idea to meet their own selfish ends.