This essay is not broadly well-known but is a major focal point for arguments among modern leftists. British Marxist Mark Fisher argues, in 2013, that leftists are abusing each other for status and vindication, and that they must learn to disagree with one another without trying to purge each other for views or statements they find distasteful. He describes just how the dynamics of this purging tendency works. You can now make a case that there's a direct line between what he describes and condemns here and what's called "cancel culture" today. Fisher committed suicide in 2017.