There was an interesting study done a few years back that found conservatives tend to utilize the old school tribal mindset and fear-based responses far more than liberals do. Essentially, conservatives largely utilize fear-based responses and reasoning over logic.
This is perfectly encapsulated by climate change denial, xenophobia, responses to terrorism, etc on behalf of conservative voters. This is why most Trump supporters don't care that the proposed border wall won't solve anything (especially with the thousands of existing drug tunnels that will only help the cartels who control them increase profits by now acting as tunnels to smuggle in immigrants as well), this is why they don't care that Trump's trickle down and deregulation approach always results in economic failure, this is why they don't care about Trump's attacks on free speech and freedom of the press, this is why they don't care about the massive and inevitable conflict of interests his businesses will have with him as President (a situation very similar to Cheney/Halliburton and Iraq War). Essentially, their fear of immigrants, Muslims, etc overrides their logic centers and critical thinking abilities, which should otherwise make those things apparent, but either don't, or they simply don't care (selective outrage and hypocrisy are commonplace as a result).
In fact even brain studies have shown overactivity in the amydala of conservative voters versus liberal voters. The amygdala controls fear and fear based responses.
It also leads to more of that old school tribal mindset, a reason many conservatives tend to be opposed to change of any kind (which is a principle aspect of conservative/regressive ideology), despite change being fundamental to the continuation of any society. Adaptability isn't a forte of many conservative voters as a result, which again is antithetical to the concept of evolution and continued survival in an ever changing world and society.
Liberals tend to be more open minded and pragmatic, more willing to accept those different from them in opposition to the ancient tribal mindsets.
I know I'm also using wide blanket statements and obviously there are always exceptions. There are plenty of open minded conservatives and plenty of close minded liberals as well. But overall, brain studies and emotional responses reinforce the premise.
EDIT: Basically, if we use Star Trek terminology, liberals are Vulcans and conservatives are Klingons.
