it seems to me that when people think of identity politics, they think immediately of things like particularity and universality (in which all sorts of things get supposed about, say, women).
adorno's critique of what he calls 'identitarian thinking' is perhaps the best place to begin for understanding the practices and suppositions of an identity politics (with whatever identity you like to pin to that), and it certainly has nothing to do with women, blacks, lesbians, ... unless you want to continue assuming another identity politics as the unexplored, and universal identity (humanity, Man, proletariat as the universal class, etc) upon which all other identities are rendered insufficient, inadequate, etc.
Angela _________