2 Samuel 1:11-16: in context

An Amalekite comes to David claiming to have killed the wounded Saul at his own request, thinking to win David's favor by bringing news of his enemy's death, even carrying Saul's crown. Instead, David and his men tear their clothes, mourn, weep, and fast until evening for Saul and Jonathan and the fallen of Israel. Then David turns to the young man: how were you not afraid to put out your hand to destroy the LORD's anointed? And he has him executed, saying, your own mouth has testified against you.

The striking thing is David's refusal to profit from the death of the one who had hunted him. The Amalekite expected a reward; he had, in his telling, done David a favor by finishing off the king who wanted David dead. But David does not rejoice. Saul had been his relentless enemy, throwing spears at him, chasing him through the wilderness, and yet David grieves him deeply and treats the man who boasts of killing him as a murderer. Why? Because Saul was the LORD's anointed, and to David that was sacred even when the anointed one was his enemy. David had twice refused to kill Saul himself when he had the chance, for the same reason. His reverence for what God had set apart was stronger than his personal grievance; he would not lay a hand on, or reward the killing of, the man God had anointed, however badly that man had treated him. It is a rare integrity, to refuse to celebrate or benefit from the downfall of an enemy because you honor something in them that belongs to God. David grieved the very man who sought his life, because his reverence for God ran deeper than his own vindication.

Can I honor what belongs to God even in someone who has wronged me, refusing to rejoice in or profit from an enemy's downfall, as David grieved rather than gloated over Saul?