After Donald Trump’s election, some universities echoed with primal howls. Faculty members canceled classes for weeping, terrified students who asked: How could this possibly be happening?

I share apprehensions about President-elect Trump, but I also fear the reaction was evidence of how insular universities have become. When students inhabit liberal bubbles, they’re not learning much about their own country. To be fully educated, students should encounter not only Plato, but also Republicans.

We liberals are adept at pointing out the hypocrisies of Trump, but we should also address our own hypocrisy in terrain we govern, such as most universities: Too often, we embrace diversity of all kinds except for ideological. Repeated studies have found that about 10 percent of professors in the social sciences or the humanities are Republicans.

We champion tolerance, except for conservatives and evangelical Christians. We want to be inclusive of people who don’t look like us — so long as they think like us.