She is likely exhibiting ethnocentrism. This is being
defined as a way of showing judgement towards to other cultures based on their
own standards that they are accustomed of or in their own culture. The American
likely acted that way after seeing crickets to be eaten by locals because it is
not normal or a tradition for their culture to eat bugs or even cover them with chocolates as
they eat it.
The appropriate response is self-fulfilling prophecy. A self-fulfilling prophecy is a forecast that straightforwardly or in a roundabout way makes itself turn out to be valid, by the very terms of the prediction itself, because of positive criticism amongst conviction and conduct.
