Armin-Paulus Hampel, a former journalist and commentator who now is a member of the Bundestag, is ebullient, affable, opinionated, voluble and excellent company at lunch. But because his party is Alternative for Germany, one wonders whether he is representative of it, and whether he is as congenial politically as he is socially. AfD is a Rorschach test for observers of German politics, who see in it either a recrudescence of ominous national tendencies or a healthy response of the political market to unaddressed anxieties.