We should protect the voice of the powerless in the face of violence. We should treat human beings as individual persons, not pawns of identity-exploiting optics. We should fight for the presumption of innocence, not just in the court of law but as the cultural norm we grant the accused in discourse.
Source: Presumption of Innocence Is Social Justice - Foundation for Economic Education
It's not so much that some people are for social justice and some people are against it. It's that people have different ideas about what social justice means. You can't really say that you are FOR social justice while acting AGAINST the presumption of innocence.