> people pushed out and marginalized in left-wing circles because
> they didn’t use the proper set of social and class signals to
> satisfy the world of intersectional politics.
This definitely happens, but not as some sort of organized strategy by "the left". It happens because "the left" on college campuses is made up of young people who are angry about the racist/sexist/classist/etc culture in which they have grown up, but have not yet learned to be diplomatic with and empathetic to people who are less informed.
The goal isn't for people to avoid certain terms, the goal is for people to not be assholes.
[1] http://www.vox.com/2015/1/28/7930845/political-correctness-d...