You should not judge others eating habits.
Bill and Peter are at the restaurant and are ordering food when Peter orders french fries soaked in gravy.
Bill wants to comment on Peter's order.
Bill tells Peter that his choice sounds delicious and tempting and that he'll order that next time.
Bill tells Peter his choice of appetizer was gross and unhealthy and that he'll die eating stuff like that.
Peter is happy that his friend has validated his choice in what to eat that day.
Peter is annoyed that Bill is judging him and now feels self conscious about what he's going to eat.