It is not okay to be rude to other people.
Dave is walking down the street when he notices an obese man, James struggling to get up some stairs.
Dave wants to make a comment to James.
Dave tells James that he should just take it slow, and he'll get up there and that James believes in him.
Dave tells James that he's so fat it disgusts him and that watching him struggle is depressing, so he should just stay indoors.
James is emboldened by Dave's supportive words and empowered to try harder to get up the stairs.
James is saddened by the words and slowly sinks into depression from massive self consciousness.