Labels are easy. Discussion is harder.
Unfortunately, the climate in this country right now makes it all too common for people to label each other idiots rather than talk through differences. I don't see that changing any time soon.
What do we do about the people who are Absolutely Right. The ones who are never wrong, unless there's a but attached to it. The people who never make mistakes. Im not sure how to interact with them. The most valuable lessons I learn are by making mistakes.
Until we all learn we aren't perfect, discussion and compromise become awfully hard to accomplish.
Of course the other solution is to dump Facebook. LOL
I found this lecture helpful on that topic "Dealing with unchangeable minds":
Some won't like this at all though since it may go against their religious views. So... yeah. Hard to please everyone. And yes, sometimes it's better just to say, "This person isn't worth interacting with anymore" and find other interesting people who are.