So, let's see if I've got this straight...
A guy is sitting alone on a train because he's such a jerk no one wants to travel with him. A man and his two children, looking for seats on the train, find his near-empty compartment, and decide to brighten his otherwise drab and miserable existence by alloting him some undeserved company so he won't look like the sad and pathetic loser that he is.
The man, whether due to a bad spot in the tracks, a bump from his loser neighbor, or jostling from one of his kids, or perhaps mere clumsiness, accidentally spills some soda on the sad, pathetic, loser.
The sad, pathetic, loser, instead of taking it in stride and behaving in a manner befitting someone old enough to ride a train by themself, utters a foul oath in front of the man's two young children, and act considered reprehensible pretty much throughout the civilized world. He is asked to apologize for his uncivilized breach of manners, and insteads unleashes a tirade of filth, at which point the father decides to cut his losses and leave with his children to protect them from exposure to this sad, pathetic, loser.
The sad, pathetic, loser, not to have his 'fun' denied him so easily, hurls one last dagger, not at the father, who 'wronged' him, but at the man's children, by spoiling their enjoyment of a BOOK, of all things.
Somehow you find the sad, pathetic, loser's actions laudable.
Have I got all that right? If so, then you too, are a sad, pathetic, loser.