"The Aztec word for the psilocybin mushroom was teonanacatl, which means literally "god's flesh"; when it was eaten in religious ceremonies, it gave … - Jonathan Haidt

Morality binds and blinds. This is not just something that happens to people on the other side. We all get sucked into tribal moral communities. We circle around sacred values and then share post hoc arguments about why we are so right and they are so wrong. We think the other side is blind to truth, reason, science, and common sense, but in fact everyone goes blind when talking about their sacred objects.
If you want to understand another group, follow the sacredness. As a first step, think about the six moral foundations, and try to figure out which one or two are carrying the most weight in a particular controversy. And if you really want to open your mind, open your heart first.
If you can have at least one friendly interaction with a member of the “other” group, you’ll find it far easier to listen to what they’re saying, and maybe even see a controversial issue in a new light. You may not agree, but you’ll probably shift from Manichaean disagreement to a more respectful and constructive yin-yang disagreement.

Although I am a political liberal, I believe that conservatives have a better understanding of moral development (although not of moral psychology in general — they are too committed to the myth of pure evil). Conservatives want schools to teach lessons that will create a positive and uniquely American identity, including a heavy dose of American history and civics, using English as the only national language. Liberals are justifiably wary of jingoism, nationalism, and the focus on books by “dead white males,” but I think everyone who cares about education should remember that the American motto of e pluribus, unum (from many, one) has two parts. The celebration of pluribus should be balanced by policies that strengthen the unum.

We humans have an extraordinary ability to care about things beyond ourselves, to circle around those things with other people, and in the process to bind ourselves into teams that can pursue larger projects. That’s what religion is all about.