Caring is at the heart of ethics. We have responsibilities toward other people. We don't exist alone in this universe, so the highest form of caring is the honest expression of benevolence. A caring person feels an emotional response to both the pain and pleasure of others.
Speaking out, and demanding change when injustice occurs is an absolute requirement if one is going to attempt to live an ethical life. If you do not speak up when injustice prevails, then you have implicitly approved of it.