Three years ago, I wrote a post called "Politics and friendship":
The inspiration behind the post came from when I read the comments of someone who was enraged that President Barack Obama had been re-elected. Rather than follow in the footsteps of Kid Rock with his good sportsmanship, this person chose to lash out at everyone, most specifically, friends who disagreed with them. I think the post from three years ago holds true now, especially given how politics seems to divide people more than ever.
(I should note, however, that the post referred to mere difference of opinion - I certainly wasn't suggesting that people shouldn't unfriend obvious hateful bigots.)