To be sure, patriot-Americans are not know-nothing nativists or backwater rubes, nor are post-Americans traitors.
Predictably enough, a certain brand of know-nothing militarist sees the need for yet another war.
Such revelations seem like the dream come true of know-nothing anti-Catholicism.
"ignoramus," 1827, from know + nothing. As a U.S. nativist political party, active 1853-56, the name refers to the secret society at the core of the party, about which members were instructed to answer, if asked about it, that they "know nothing." The party eventually merged into the Republican Party.