I have (had?) a liberal friend from college. He unfriended me on Facebook.
He's a Bernie Sanders supporter. He's an economic illiterate. He constantly posted "Occupy Democrats" memes that were inaccurate or outright lies.
Now I'm an avid anti-Socialist. I was a Republican for years but moved over to the Libertarian position probably a decade ago. In the early 1970's, as a teenager, I had the good fortune of traveling behind the iron curtain during the cold war between the US and the USSR. That experience cemented my hatred of socialism/communism.
But with my college friend on FB all I would do was be very civil. Never argued. Provided links to non-partisan websites refuting socialist tax claims, economic claims, etc.
So for being honest and objective I got unfriended. I gather that is a common thing for liberals to do when they don't want to face the truth.
I think I witnessed part of that discussion.