Back in university, I had a flatmate that was pro-Bush. He wasn't unintelligent. He was getting his masters. He was a good guy and generally progressive in his views. He actually had pretty well laid out arguments as far as what he saw as best for the country and policy with the continuation of the Bush administration over Kerry.
Both myself and my other housemates didn't understand it at the time, but I didn't lose respect for him as a person. In the most recent election, I've come to at least understand more of his views. I wish I could talk to him about it, but he passed away a few years ago.
I currently hold a controversial opinion myself, that the parties are essentially the same and the elections simply do not matter. I do not think anything would be different under either potential candidate. You can say some of the social issues would be affected (trans people in the military), but if you focus on those, you view the current government as just stupid. But they're not. They knew banning trans people would cause outrage. You add a stupid reason, and you need to realize they knew that was an intentionally stupid reason, and people focus their hate. It is literally the 2 minute hate from Orwell's 1984, except it's been around for over a decade and it's now the 24/7 hate from all the news networks.
http://fightthefuture.org/articles/the-fallout-of-american-a...
In big tech areas, I cannot get over the number of people who would say, "No there is a difference [between the parties]!" whenever I expressed this view. Over 60 million people voted for Trump. That doesn't mean those 60+ million are uneducated or stupid or racist. Over 60 million people voted for Clinton. That doesn't mean those 60+ million are compromising or ignorant. Over 40% of those eligible chose not to vote. They all get clumped together, even though their reasons are greatly varied.
And keep in mind, there is a 2014 Princeton Study that shows the the opinions of the average voter in America have a statically insignificant, near zero, effect on all policy decisions (unless you're part of the top 10% of income earners):
https://scholar.princeton.edu/sites/default/files/mgilens/fi...
America, and even many European nations, are becoming increasingly polarized. But human beings don't fit into two categories. There is no real left or right. Someone might be supportive of gay rights, be for gun control and yet still think trans people suffer from mental illness. Another might be against gun control and affirmative action, and have other libertarian-ish beliefs, yet believe strongly in public transportation and universal health care.
We do not fit into the nice cylinders of political categories, and we certainly don't fit into the false dichotomy of the left/right. But we're taught that's where the line is, that we have to take sides, and keep fighting each other instead of the real players, the _eminence grise_ of Exxon, BP, Microsoft, Facebook, Google, Boeing and all the other players who really control what's going on and who are systematically implementing policy that increases tension, increases conflict and escalates war throughout the would.