From Justice League #17, the end of the “Throne of Atlantis” Arc, aka how to make someone turn around and pity-adore the antagonist. I’ve included the “I loved you like any brother should” speech and the panel where Orm fights on his brother’s side after relinquishing rule. But it’s the last two pages that pushed this into “Arthur, that’s your dumb baby brother! I love him; how could you?”

Overall Context: Vulko (the onlooker in the third image with the panel voice-over from Arthur about how alone he is) manipulates current king of Atlantis, Orm, into attacking the surface world as a plan to replace him with the elder half-human illegitimate Arthur – a plan that works out perfectly except for all the collateral Atlantean and human civilian causalities and having to also unleash the Trench (creepy fish monster people).