Very true Lenny. Allport spoke about the various emphasis in order to prove that prejudice should not be linked to only one reason; in fact, on page 225, we see that "race prejudice is a social attitude propagated among the public by an exploiting class for the purpose of stigmatizing some group as inferior so that the exploited of either the group itself or its resources may both be justified," per Cox, Marxist and the others. This propagation was design to drive fear in some and exploit them for economic control. In the end, none of the emphasis cannot stand alone and provide a complete description of the reason for prejudice. Certain groups including Orientals, Negroes, Mexicans and American Indians were all viewed differently; nonetheless,