It's hard to believe that you have a genuine interest in discussing the topic when you freely dismiss elements of the show that are in no way unique to this episode as "that's not realistic".
I am discussing the morality of killing one's brother because said brother is depressed.
When discussing morality, I don't take as true moral/societal values that are obviously not viable/abhorrent (of which you find a lot in trek relating to klingon "culture").
In these matters, I find the opposite practice (embraced by quite a few participants in this thread) toxic.
Because it can lead to many actually believing the abhorrent conclusions based on such flawed premises have any validity.