Oh for fucks sakes, Oda is saying if you pay attention to Hiyoris story, you would realize SHE believes only Orochi should burn. Shes not the type who would hold O-Tama responsible for the sins of their family, as that's exactly what happened to her family.
That's just Hiyori, but how would others react if they found out about Tama being a Kurozumi. It's an issue that not only plagues our World, but one that plagues the One Piece World.
It's gotten so bad, that even Oda is starting to tell fans to pay more attention....