Crossposting from NeoGAF:
Great chapter. Let me say that while I love the Vinsmokes from an aesthetic and conceptual perspective, up until these recent two chapters I've always thought the genetic modication to be sociopaths was a really stupid plot point. It's only recently that I've seen where Oda was going with that. Ichiji, Niji, Sanji and Yonji are quadruplets, so they should, theoretically, be extremely similar personality wise - and, if you have ever read twin studies, feel an inherent need to be around each other. Sanji, Reiju, and Sora are all very kind people, and Judge, while a massive asshole, is more poisoned by pride than anything else and has that same emotional interior his (normal human) family does. The three modified bros have had that kindness removed. They didn't even fear their own death. When Reiju called them "those poor boys" is when I understood. They may have beaten, ridiculed, and tormented Sanji as children, but their sociopathy is meant to be seen a tragedy. Otherwise, they'd share the same kind of passion and kindness their mother and siblings do. That's why Sanji wants to save them, even if they made his life hell. His dramatic entrance as a capable fighter without a raid suit compared to his sibling's helplessness was also some great poetic justice.
Judge is the real culprit behind everything. His wife disagreed with him, his daughter does too, and the only reason his three sons follow him is because they're modified to. They don't even love him, or anyone.
TL;DR @#$% Judge. He ruined Sanji's life, but he also ruined his other son's lives. Think about all the times we've seen Sanji's passion. His smile when he talks about All Blue. His father/son moments with Zeff. His willingness to sacrifice himself for his friends. Every time you see 1, 2, or 4 they have this smug grin on their face. They always look like they're perfectly content sitting at the top of their world. But it isn't "real," it has no soul to it. They wore the same grins with guns pointed at their heads while their macho father was bawling his eyes out.
His brothers will never smile like that.
SUPER HYPE for the BM flashback. Elbaf's been a long time coming. Also that huge tree on the island is either Adam or a Yggdrasil reference.