The Left repeats this scene when one of its own gets off-balance. And now, it is off-balance to find oneself in a Wrong Class, such as being a white, cis-gendered male, for example.
Jonathan Chait has reaped a bit of what he has sown, as a Social Justice Warrior upon whom the SJWs have turned. He is being dismissed as irrelevant due to his identity, which is white, cis-gendered, male.
The Left is an encampment of many tribes, most of which are enemies of the other tribes even though all the tribes hate the same Other. But their penchant for Othering slops over into their own camp, too, because some of their own camp share identities with the Other, such as Chait shares in his whiteness, maleness etc. He is Othered by those who are not white, male, cis-gendered. Those are the only true Victimhood Classes, not anyone who does not share their identity. Lacking the proper identity, Chait may not speak for these classes, and should he try to do so he would be victimizing them even more. Chait is Othered.
So the identity Class War becomes a feeding frenzy upon their own, as the tactic of "political correctness" (thought control) excludes Chait, for example, or males who transgender into faux females, or white women who cannot comprehend black women, on and on and on. Because the identity of all Leftist Victimhood Classes is based purely on hatred of other people who are designated as Oppressor Class enemies, sooner or later each individual Victimhood Class will find that other Victimhood Classes are stuffed with their enemies, too. And that is what has happened.
Chait's plaints have aroused hoots and peals of laughter from both of the Classes which he himself has designated as Oppressors of his own, small, Messiah Class. He positions himself as a "liberal" which is different from Leftists and also different from conservatives, both of which fall into Chait's Oppressor Classes. He is a Class and Social Justice Warrior, as much politically correct as those he demonizes. Here he thrashes his own supposedly anti-PC arguments:
"Political correctness appeals to liberals because it claims to represent a more authentic and strident opposition to their shared enemy of race and gender bias. And of course liberals are correct not only to oppose racism and sexism but to grasp (in a way conservatives generally do not) that these biases cast a nefarious and continuing shadow over nearly every facet of American life. Since race and gender biases are embedded in our social and familial habits, our economic patterns, and even our subconscious minds, they need to be fought with some level of consciousness. The mere absence of overt discrimination will not do."He cannot hide his own PC Leftist position, even when attacking PC Leftist positioning. It is clear that he merely wants his own Victimhood Categories to trump those of the Other Leftists, who view his own identity as Oppressor.
So this whole episode is just another case of the Left savaging the Left, an eventuality which is self-evidently necessary within the bounds of hate-war that the entire Left wages.