Am I the only one that saw strong parallels with the relationship of John and Danny, and the batman and the joker?
Looking past the obvious detective vs. criminal
angle, there are some major similarities. John stood for everything good related to the Rayburn family, and Danny was the offspring of everything bad about the Rayburn family. While John was protecting the whole island (as Robert put it), Danny had been shamed and mistreated by the Rayburn family for so long that he literally becomes an agent of chaos halfway through the season.
At a glance, Danny's criminal actions can be seen as careless activities that are driven by greed and selfishness. But in reality, every single move was part of a calculated equation to bring misery upon the Rayburn family. And in his death, he did just that by breaking John and placing the final piece needed to destroy the Rayburns in season 2. He even lets out audible laughs as John breaks and clobbers him with a branch. In that moment, Danny knew he had won, and he rejoiced in it.