It's always interesting to me that people with opposing viewpoints assume that I will fight them to the death because of my own. I think it surprises a lot of people to come across a pro-(insert abortion stance here)-er who is open minded enough to understand the other side, and sympathize with it. Instead of two open minded individuals coming to a conversation, it's one willing to discuss both sides and one who is walking into it with their guards up and locked in place. It's a waste of time for both parties, which is annoying (to say the least).
The next time you're faced with someone whose opinion differs from your's, don't go into the conversation ready to defend. Go into it with your mind and ears open, and you just mind learn something about the other side.