Actually, I think positions like "After hearing <Candidate A>, I don't know why anyone would vote for <Candidate B>" demonstrate ... .
What is fundamentally wrong with American politics these days. If you can't understand why someone would view the world differently than you, and choose a different leader to follow, you're the one with a problem and a diminished capacity for thoughtful, critical analysis of important social and political issues.
And you have no idea who these very smart, very politically astute friends are. They don't think you're somehow lesser, deficient, lacking awareness or intelligence, or otherwise engaged less in politics than they are simply because you're supporting Secretary Clinton.
But please, go ahead and continue judging people you've never met and have no idea about.