The fallacy that's illustrated by the statement "The customers should be more polite." is the tu quoque fallacy.
The tu quoque fallacy occurs when an invalid attempt is made by a person while responding to criticism. From the question, we can infer that the person accused the customer while responding to the customer's rude behaviour. This is an example of the tu quoque fallacy. It is when a person discredits the argument of others
I feel quite happy! Learning about different cultures and new experiences excites me because it's something completely new and unusual to me. I cherish that.