Jim, I don't think you're being anti-methodological in the least.
I would argue in fact that we're all at least somewhat in agreement about behaviors not being the appropriate proxies for a civic identity (or multiple identities). Instead, the behaviors are ways that a civic identity might be expressed (but not that only those with a civic identity engage in civic behaviors). The question then is whether underlying non-behavioral components of a civic identity can be defined. For instance, is perceived connection (possibly an emotional connection) or membership to a democratic system a component? (a desire for such a system might also be part of this so that such a model could be used for activists in communist or dictatorial governments; or, in the case of Somalia, no government). A commitment to being involved in a democratic system would seem to be another important piece - which could take a multitude of forms (voting, activism, protests, boycotting, buycotting, etc.) as well as a multitude of ways to engage in these forms (to Peter's point about pluralism). are there other components? are these the right components? Am I completely off base?