my sister in law un-friended me right after Trump got elected
she is hard core left wing Trump hater, and I am not
right before the election I was posting some pro-Trump stuff, and when he was elected I posted a few "I told you so" posts, and she immediately un-friended me. good, I don't like her anyway! 
Within the week after the 2016 election, I must have seen 3 dozen reports from friends being unfriended. I personally had 3 drop me after being FB friends since 2009.
One friend from high school unfriended me. When I DM'ed him to explain the difference between unfriend and unfollow, a week later he friended me again and apologized. That lasted all of a month after he started trolling my timeline and getting into fights with anyone who voted for Trump (or against Hillary).
Always the "tolerant" party supporters who can't tolerate opposing opinions. I've never unfriended anyone who had opposing political views. I've often taken the discussions offline to better discuss facts without the peanut galleries chiming in and trolling the thread.
What's "Facebook"? A book of faces? That sounds stupid. Like something created by someone in elementary school.
FACEBOOK was STOLEN from the school's student & faculty directory Zuckerberg and his co-authors based the idea on.
"At that time Mark Zuckerberg was a sophomore at Harvard University. The name for Facebook came from
the publications that some colleges pass out to students at the beginning of the year to help students get to
know each other better, called a Facebook."