It is wrong to be rude to people.
Alan is dining at a busy restaurant.
He wants to get the check.
Alan waits patiently until he sees his server and tells the server he is in a rush.
Alan is mad at how long he has been waiting and finds a manager to scream at.
Alan gets the check in a timely fashion and gives the server a generous tip.
The manager is so worked up because of Alan that he takes his frustration out on the waitstaff and one of them end up quitting.