XWhole Foods Shopper's dashboard

Why do employees in San Mateo and Palo Alto stores have such bad attitudes towards customers (i.e., produce guy, who glares at customers entering San Mateo store instead of returning their greeting; grumpy, gruff cashiers at both stores w/strikingly resentful attitudes; sarcastic Palo Alto meatcutter; San Mateo store manager who remarked that a long line of customers waiting at customer service counter would "just have to keep waiting" because she's too busy)?? It seems these employees feel justified in their disdain for and actually resent Whole Foods customers and would rather we not shop at their stores (which is now a strong consideration)!