User blog comment:Thailog/Ep. 203 "Alienated" discussion/@comment-5091218-20120517041121/@comment-5069635-20120523074705

Sorry, Kesia, the "losing a loved one" card doesn't hand-wave this massive breach of personality. Namely, cruelty for cruelty's sake. And converting just because he found out his father is Black Manta, after all the angst his close friends Superboy and Artemis pulled through, doesn't make a lick of sense.

I give a plausible explanation of his actions here, if you're interested. The last part needs to be tweaked, now, by what we've learned of Red Arrow, but it could still apply in a general sense.