Ezra Klein's book why we're polarized cover this a bit and basically studies show that intelligence level has little to do with what people believe and more so just affects their ability to defend whichever position they already hold.
The quality I value in myself (and others when I find it) is a bias to doubt evidence of things I already believe, and to accept proof of things I do not believe. The bias isn't strong (that way lies madness!), but it makes your mental model of the world stronger. It's also a much better filter than "intelligent", "polite" or "articulate", which are all orthogonal to the kind of rational, open skepticism I advocate. The big downside is that such qualities are subtle and hard to judge. Tribal affiliation is, for all its faults, easy to measure.
Another point of optimism: being a persecuted (or neglected) minority can have some positive effects, if you can find your people.