Claude's negative attitude toward Texas accents is most probably a result of Generalization.
Explanation:
Generalization is a really common occurrence in places where there is no cultural homogeneity and there are different types of people doing different types of things and having different cultures.
Claude has a negative experience with people who are obviously with a Texan accent so he kind of begins to hate the accent by association.
Because he is not familiar with the people from there he begins to generalize then into general hatred towards people from Texas.
