WTF? :| That makes no sense at all. It's like your finding an excuse this:
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During the Warring States Period, ninja were organised into small mercenary clans that knew nothing but battle.
The two strongest of these clans were the Senju and the Uchiha, who had warred against each other for their entire histories. Eventually, intending to end the countless bloodshed, Hashirama Senju used his position as leader of his clan to create a truce with the Uchiha clan. The Senju, the Uchiha, and their affiliated clans formed the first shinobi village: Konohagakure — a name invented by Madara himself. Other villages would soon start being formed following Konoha's example, ending the Warring States Period.
The Uchiha, and Senju were known as the strongest clans, even before Konoha was built.