You sound like bizarro-world utgibbs. Mainstream, right-of-center America is awfully schizophrenic...
I don't think America has a "mainstream" any more. It has two divergent "mainstreams," with each mistaking themselves to be a majority. It's a political spectrum rather than political categories, these days (if it were ever really that different).
Polls show America as right of center on the issues when the issues are listed independent of party. Dems have mastered the art of tapping into special interest groups who will vote on one issue if sufficiently scared. The GOP does it too but nowhere near the level of success that Dems have.
I think you are right that we have a diverging country. IMO, the survival of the country will eventually come down to an amicable divorce whereby 2-5 new countries are formed or else a return to a much more federalist system. It would not bother me at all if a state had gibbs philosophy on economics but shared a military with my state. I wouldn't mind if a state had your "middle of the road" policies and shared a highway system with mine. Personally I think 50 states striving to come up with solutions for problems would be vastly superior to a top down, centralized approach.
As long as power is centralized in DC, we will continue to repeat these cycles of failure.