Board Thread:Theories and Speculation/@comment-5407586-20150624095943/@comment-732150-20150624184522

So why was the whole thing weak to Lightning Release? Combined natures were never shown to inherit their component's weaknesses, so whatever happened, there definitely was pure earth chakra. Either that or this mess exists solely because Kishimoto decided to make Deidara's abilities a kekkei genkai, completely disregarding his own previously established facts, which I find an infinitely more probable possibility. Kishimoto really dropped the ball on the combined natures issue, and it's not really something is complex, it's been done to death in all sort of fiction.