It ' s probably just reference to the fact that Hanzo and Genji were the heirs to a major crime family . Genji wasn ' t interested and didn ' t act in the family ' s interests , so Hanzo was forced to kill him . It ' s brought up in the Dragons short . If you haven ' t seen it , I highly recommend it . Genji ' s nickname was apparently Sparrow , but I don ' t think it ' s been revealed WHY . Also , in the Dragons short , Hanzo brings a sparrow feather as an offering to honor Genji . And at the end of it when Genji ninjapoofs away , he leaves behind a sparrow feather . <| sep |> 7 keys for nugget <| sep |> I never said the past was better . In fact , there were plenty of interpretations of the Bible in the past that were flat out wrong . Not all , of course . I think humanity is fairly consistent in being bad throughout time . More people claimed to be Christian , or even went to church in the 1950 s but couldn ' t name more than a handful of the books from the Bible . Plenty of horrible things have been deliberately misinterpreted to justify horrible things , and it continues to this day . So , just because a popular misinterpretation changes from decade to decade doesn ' t mean we should just shrug our shoulders and say Oh , well , now ' sin A ' is okay and ' sin B ' is not .