Most of my good friends, let alone Facebook friends do not share similar views. Some people are pro legalizing drugs, some are anti, some are more socialist whereas some are free marketeers, some are pro foreign intervention and some are isolationist. We don't spend most of our time talking politics and it just doesn't matter that much.

If you don't have any friends with different political views, this is an unlikely enough occurrence via chance that it seems like it's a deliberate choice, and that's not a choice that I have anything good to say about.