juvenoia
The fear or hostility directed by an older generation toward a younger one, or toward youth culture in general.
uncountable
One particularly salient and instructive example of a full blown juvenoia from recent time was the comic book scare of the 1950s, elaborated in a fascinating book by David Hajdu, The 10 Cent Plague.(Hajdu, 2009)
Where it comes from
Coined by American sociologist David Finkelhor in 2010, from a blend of juvenile + paranoia.
Adapted from the Wiktionary entry juvenoia (CC BY-SA 4.0).