i'll try to find a snippet of protoss history that describes what i'm talking about
"The raging battles waged during the Aeon of Strife were fought by countless generations of Protoss, all bent on perpetuating the guilt and blame for their abandonment. Although few actual records remain from this "lost period" of Protoss history, it is clear that the First Born devolved into frantic legions of merciless killers. Driven by centuries of unthinking hatred towards their brethren, entire generations of Protoss lived and died without ever knowing the legacies of their past or of their primal psychic bond that their forefathers had once shared."
"Khas was able to channel the primal energies of the Crystals through himself, allowing him to access the primordial, psychic bond of his race. For the first time in thousands of years, the primal chord of the Protoss was tapped. Flooded by emotions emanating from every member of his race, Khas became aware that the Protoss had not lost their primal link, but had simply forgotten how to attune themselves to it. Khas, gathering many young Protoss together, was able to teach the new generation of warriors how to access their latent psychic bond."
i guess you can take that how you will, lol