Text: Hard-core left-wingers are horrified by this rise in nostalgia about the 1950s, a decade that was seen, not so long ago, as a grim period of pre-enlightenment, racist, sexist, capitalist boredom.
Entailment: Left-wingers are mortified by a rise of nostalgia concerning the 1950s.
Contradiction: Right-wingers are afraid of the rise of idolization of the 1950s.