Originally Posted by stubborn_d0nkey
uncles can be younger than their nephews. it happens. so a few years older isn't really that big of a deal
you completely missed the point -__-
Kushina came to konoha as a child. Her village was already destroyed at that time. Kabuto wasn't born yet. He was found as a child in the remains of a battlefield between konoha and a unknown village. That battle happened years after kushina came to konoha.
Simple put, there's no way that unknown village kabuto came from was the whirlpool village, because it was long destroyed by then.