If you want to build good defenses against discrimination, it should start with yourself. Deciding, and realizing that everybody in this world, no matter what their color, gender, or belief, has a purpose and can bring something good to the community. If you understand that we are all human beings, with feelings and capability of being loved, you will see the world in a new light. This new way of thinking can be contagious as you will live your life positively. And before you know it, the world is going to buy into this. So to summarize, allowing yourself to treat everyone as equally as possible, you are basically raising a great defense against discrimination. From yourself, and from other people.