I think it may be from pressure from religious groups as it throws the God made earth is 7 days story out of whack, although that is ridiculous because if the 'Nephilim' were proven to have existed it would give the Bible so much more credence to those who don't have faith. Maybe it'sjust a powerful group of academics who just don't want the truth out, who can say?
It throws current Darwinism theories in the bin, albeit only slightly, there is no reason the Darwinists need to feel threatened afterall they could just have been another human sub-set.
It's frustrating because the truth would be so much more interesting than the lie.
RE: When does a myth become truth? Pt10b - The Giants - Red Haired Giants of the America's