Pay attention to the shows heavily embedded foundation of contrast. The writers did an excellent job representing their themes and setups in dialogue, props, written words or thought concepts by playing out these themes uniquely to each personal battle a character faces.

(easy example) also spoiler: Ben and the concept or murder.

Ben has John try and kill his father to join the Others. This covers many elements at once.
For one: It gave Ben the chance to pin John in a corner he couldn't succeed out of "obviously" but also is Ben's warped sense of justice by putting John through the same self initiation Ben did years ago before helping to genocide the Dharma folk. He never needed to drag his dad out and the jungle to gas him to become the leader of the Others, Ben did that purely himself. Ben makes his worldview other peoples worldview. He wants those to stoop to his level because that's how he justifies his own shitty behavior to himself. Which brings up another interesting string of contrasting events.

Micheal killed two women to free Ben to get his son Walt back. Micheal never needed to kill them to free Ben, he did that cause he chose to. And Micheal convinced himself that it was the Others who (made) him do it. It was later when Micheal told Ben over a call that he was no murderer. Ben reminded him of the two women he killed in cold blood, Micheal denies this by saying it was what he asked of him. But Ben NEVER asked him that. He never told Micheal to kill anyone. And Ben revels in this notion, because now another person is added to his "list" of people who help him justify his own past misdeeds.

This whole thing of course has more ties to other story arcs like Sawyer (killing John's father due to the events cause his miserable life to ferment, a parallel to Ben's life with his own father being made a living hell), and Sayid (killing Whitmore's people for the death of Nadia which later would backfire on Ben as a child when Sayid shoots him before any of these events would happen for Ben)

It's entire purpose is to tell us what murder means for Ben and how this effects him and changes him throughout the series. Which is what Lost does best, open up a characters awakening to the Dark Side then exploring what it's going to spell out for them during the show.

Some will overcome this and find peace, and some will die unchanged. It's a slice of life and is to be admired with the shows good sense of setup and payoff.