When we see others as the enemy, we risk becoming what we hate. When we oppress others, we end up oppressing ourselves. All of our humanity is dependent upon recognizing the humanity in others.
If you are going to be a leader, you must have a record where people saw you are standing up against injustice at a risk. Then that builds up your stock of credibility so that, when you speak on another occasion about a different thing, people will pay attention.