There’s a crisis afoot in the land — people are being rude to President Joe Biden.

The trend of anti-Biden protestors chanting or holding signs saying “(Expletive) Joe Biden,” or the cleaner version that has come to signify the same thing, “Let’s go Brandon,” is being portrayed as a new low in American politics.

A recent Washington Post report was headlined, “Biden’s Critics Hurl Increasingly Vulgar Taunts.” It stipulated presidents have always been the subject of derision and abuse, then claimed, “The current eruption of anti-Biden signs and chants, however, is on another level, far more vulgar, and widespread.”

Really? Put aside all the abuse presidents were subjected to prior to the digital age, whether John Quincy Adams (“pimp”), Andrew Jackson (“a greater tyrant than Cromwell, Cesar, or Bonaparte”), Martin van Buren (“Martin van Ruin”), Abraham Lincoln (“the original gorilla”) or Theodore Roosevelt (“that damned cowboy”). The last few years weren’t exactly a mannerly period of polite disagreement in our national life.

As Byron York of the Washington Examiner has noted, Donald Trump’s opponents gloried in the F-word, such that without it some of them would have been rendered practically mute. When Robert De Niro introduced Bruce Springsteen at the 2018 Tony Awards, he used the opportunity to declare: “I’m gonna say one thing. (Expletive) Trump.” Cue the standing ovation.

A Los Angeles art gallery had a “(Expletive)Trump” exhibit, rapper Eminem led an “(Expletive) Trump” call-and-response at a concert in England, and so on.

The new progressive rule is “(Expletive) you” for me, but not for thee.

The “(Expletive) Joe Biden” chant took an unexpected turn last month. The NASCAR driver Brandon Brown won a race at the Talladega Superspeedway and the reporter interviewing him misstated a growing “(Expletive) Joe Biden” chant in the background as fans saying, “Let’s go Brandon.”

The substitute version of the insult, instantly adopted by the president’s critics, is more lighthearted than the original. Fundamentally, it’s a joke. It is a gibe at Biden, but also at the misreporting of the chant at the raceway, taken as a symbol of the media’s ridiculous protectiveness toward Biden.

The chant is also amusingly anodyne, given its provenance. Who can object to the cheering on Brandon, whoever he is?

Not everyone appreciates the humor, though. When a Southwest Airlines pilot allegedly spoke the offending phrase over the intercom on a flight with an Associated Press reporter on board, the outrage machine kicked into gear in a particularly blatant display of humorlessness and lack of proportion.

Harvard professor and CNN commentator Juliette Kayyem posted a missive supposedly from another pilot calling for the Southwest pilot and the crew all to be fired on grounds that he must have been too mentally unbalanced to operate the plane.

Of course, pilots shouldn’t make political announcements on their flights, and it’d be better if no one resorted to public obscenities when referring to Biden, Trump or any other officeholder. But it’s one of the privileges of living in a democratic age that people can insult the head of state without fear of jail or other punishment.