The New Us vs Them: the Non-Ideological vs the Ideological
Though I can't find any references to this phenomenon, I discern a new Us and Them beyond the ideological Us and Them (Conservative/Right vs Progressive/Left): Us being the non-ideological and Them being the ideological of any camp, with the non-ideological being in an invisible territory that is within a nation-state's boundaries but outside the ideological context of the State (government).
To be ideological is to be state-centric, defining everything in the context of state power relations and policy. In contrast, those in the Us (non-ideological) camp are indifferent to the state even as we live within the constructs of the state.