This identity politics stuff is riddled with contradictions. On the one hand you've got certain people refusing to be defined by their sexuality or gender, and then you've got people, in some cases the same people, telling everyone that because they're white or male or whatever that they are by nature oppressive towards others and that they are powerless to change their ways of their own free will.
I know I'm replying to a very early post in the thread, sorry, I've just been re-reading the whole thing and noticed it and wanted to reply.
While there's certainly a risk that elements of essentialism can result from what you're describing, my understanding of privilege politics (which by no means is exhaustive) is that the emphasis isn't on anyone being oppressive
by nature (e.g. "you're white, that means you are automatically oppressive and want to keep other people down"), but in actually trying to come to a deeper understanding of the ways in which society's structure benefits certain people over others, and urging people to be aware of this so as to, I suppose at its most basic level, foster some sort of empathy*.
As there is with any kind of politics, there will be people who then use that in decidedly unhelpful ways. I remember reading an article where a guy was attempting to explain the various ways in which society effectively 'conditions' guys to expect certain things from women. It was, on the surface, a relatively progressive piece, trying to understand how men and women are positioned. But ultimately it came across as offering some kind of "we just can't help ourselves, ladies! It's not our fault' excuse. It was all structure, no agency, if you will.
*Of course, that's where it often ends. Empathy is important, but you need to do something with that new knowledge afterwords. At it's heart, the bones of privilege theory seems to be merely wanting to highlight precisely what I said above: that there is no universal experience, that human relations are nuanced, that relations with the state are nuanced, and that power can be claimed by all sorts of people, even when they believe themselves to be being rather progressive.
I believe that privilege theory
can be used in a useful way, as part of, or a jumping off point for, trying to examine the many different ways people are constituted by, and help constitute, political and economic structures, BUT it can also, obviously, be used simply as another way to do identity politics. But just because it
can be used in that way, doesn't mean it has to be, and forever the optimist (despite being a dyed-in-the-wool cynic and curmudgeon), I can't help want to try to salvage something from the various analyses of privilege that go on, rather than dismissing the whole lot as a bad job.