Why do most religions preach that you must love other people? The reason why most religions preach that you must love other people is, that at the essence of every person that walks the planet, whatever colour, race or creed, you are One. Whatever you do to another, you do to yourself, because at a spiritual level you are joined and bonded together in the same spirit and essentially, you are only hurting yourself. Today, see yourself in everyone you meet. Over time, you will start to feel a great liberation come over you.