If you want to influence people, take Confucius' advice and live a model public life that inspires (or shames) others into behaving ethically. Don't waste time dragging yourself down into arguments with base people, live a life that contrasts yourself with base people in the eyes of others. Let you successes, your intelligence and your quality of life, sell your politics. I make sure all my friends, especially my politically- and religiously-extreme ones, know how great my life is. Every time I post a picture of my smiling happy family and our successes, I am advertising my moderately-liberal politics and my Humanist philosophy. And when my conservative Christian friends do the same, they are successfully influencing me to have a more positive outlook of their politics and religion. Be a friendly, caring representative of your side of the aisle and you will constructively influence others.