At the end of Shmuel 2 chapter 3, Joab kills Avner. Why was King David so upset and sad over his death? From reading the Tanach, it seems as if he barely knew Avner and Avner was not fond of the house of David or the tribe of Judah. It seems as if he hated Judah.
Could it be that David put on a show for the people so as to say "Hey, it wasn't me who killed him"? The reason I ask this is because right when David hears of Avners death he claims the innocence of his kingdom. Did he foresee a war with Israel if the people thought him responsible?
The reason I ask this is because David did something similar to save his life. He pretended to be insane when Saul was after him, and he had to hide in a Philistine city so that nobody would discover him.
I apologize in advance if what I'm saying is offensive to anyone. I'd just like a little more clarity as to why David was so sad and lamented Avner's death to such a high degree.