It looks like we agree more than we disagree. Truth is, the title was decided on by Medium editors (this article was commissioned by them), and I did question the wisdom of it. I don’t think liberals should “chill out.” As you articulated so well in your initial response, the stakes are way too high. But I do think that, in the minds of many liberally-minded people, something in the way liberal anxiety and outrage is expressed and disseminated is damaging the cause.
This isn’t about sympathizing with bona fide right-wingers. Those people are through the looking-glass, and there’s probably not a lot advocates of social justice can do to convert them. But the vacillating, apathetic mass of voters — the people who decide the course of elections, and, consequently, the destiny of our democracies, need to be won over. And seeing a million people losing their shit over a Chinese prom-dress ain’t going to cut it.