Arguing about religion and politics is a losing battle. You won't change anyone's mind. If you feel passionately about a subject, join a group of people who share your beliefs. You'll be able to discuss matters in a cathartic way. Are you concerned about a social issue? Launch a fundraiser or participate in a protest. There is power in numbers. People on the other side of the divide may be converted once they see all the positive change your group has caused.