> Another stand holds that there are only two really important groups: the powerful / powerless, which could also be seen as the "oppressors" and "oppressed."
Those aren't really separate stands, the latter is a consequence of the former: if language (or, rather, beliefs which is transmitted between people by language) is the defining factor in reality, then the ultimately meaningful differentiation between people is whether they are influential in shaping belief (powerful) or not (powerless).
It's also directly contrary to the central theme of Marxism, which makes the association of these particular postmodernist viewpoints with Marxism bizarre. (Certainly, there are people who moved from Marxism to this kind of postmodernism, just like there are people who have moved from Marxism to capitalism or from Marxism to democratic socialism or from Trotskyism to neoconservatism.
And yet, activists who claim to be Marxist seem to be very well aligned with others who claim postmodernist derived ideologies.
That being said, many strands of postmodernism in universities have come to teach that there is nothing outside of language itself (that's a common reading of Foucault and Derrida), so everything can be seen as a language or sign system. Want to change "reality" (as if there is such a thing!)? Just change the language.
Another stand holds that there are only two really important groups: the powerful / powerless, which could also be seen as the "oppressors" and "oppressed." Everyone is supposed to be in one of the two groups. This gets grafted onto identity politics in rather unpleasant ways (IMO).
So in the pronoun debate, people who are transgendered or non-gendered are the oppressed and need help; everyone who is not "helping" them is the oppressor and must be opposed.
This, anyway, is the line of thinking, though it isn't my own view of the world. To say that everything is linguistic seems unlikely. When I was in grad school in English (note: don't do this: https://jakeseliger.com/2012/05/22/what-you-should-know-befo... ) and would hear this argument, I liked to observe that everyone, given the choice between getting punched in the face or having someone say something mean to them, chooses the latter. This would seem to me to argue that not everything can be reduced to language, even apart from all the other very good and obvious-seeming arguments along those lines.