I really can't think why "national consciousness" should be set against genetic "ethnicity". The sense one has of belonging to a national community, with all the historic and cultural package it involves, is one thing. Trying to sort out the genetic nuances that distinguish each region, area, or sub-area, is another. Both of those concerns are not only distinct, but also complementary. There's richness in diversity. So where's the problem? We'd all go bored if our nations were well-defined, monolithic genetic blocks. We'd read a paper or two, and pass on to something else.
By the way, there's genetic diversity among Spaniards too. East Anglia and Cornwall are genetically distinct. Bavarians aren't the same as North Germans. Scandinavians can be split into subgroups. Not to mention the vast Slavic sphere...
I love my Auvergne, and its stubborn, unruly, tight-fisted, hard-working people. I also feel culturally French, heir to a literature and a history that define the lines along which I think and behave. I feel a distinct kinship with my European cousins. I have friends in Africa, India, etc... And I feel quite comfortable with it all.