Allport saw cultural ignorance as a primary barrier to intercultural communication.

Evidence

Allport emphasized the importance of cultural ignorance as a barrier to true intercultural communication. He ended his landmark book on prejudice with a section entitled “Imperatives of Intercultural Education.” In it, he argued for teaching about a number of issues regarding race, culture, prejudice, discrimination, and multiple loyalties. These were to be taught throughout the educational experience: If taught in a simple fashion all the [intercultural] points can be made intelligible to younger children and, in a more fully developed way, they can be presented to older students in high school or college. — John F. Dovidio, Peter Glick, Laurie A. Rudman, On the Nature of Prejudice, 2635