
Originally Posted by
Mislagnissa
The manual states "The Protoss civilisation spread across the face of Aiur within only a few thousand years, eventually culminating with the warring Tribes settling under a centralised rule", "As months passed on Aiur, the Protoss began to shy from their Xel’Naga teachers, and each Tribe cultivated wild and unsubstantiated rumours of their creator’s supposed treachery", "Many hundreds of Xel’Naga were murdered by the raging Protoss, who only decades before had worshipped them as gods", and "The Xel’Naga fended off the Protoss’ reckless attack and sorrowfully launched the greater number of their massive ships into the trackless void beyond Aiur."
Timescales given in the manual are highly questionable and often inconsistent, but the basic gist is that political revolutions take a lot of time in the game setting just like they do in reality. In any event, the xel'naga are clearly not omnipotent space gods and their purely defensive capabilities clearly cannot nullify the protoss weapons used at the time. While most of the xel'naga ships escaped, a minority were felled and their crews murdered by the protoss.