[Mark17]

Check out Amos 2:9. “Yet it was I who destroyed the Amorite before them, though his height was like that of the cedars, and he was as strong as the oaks.”
I tend to think the Smithsonian and others, have a vested interest in destroying all evidence of the Nephilim. To admit the Genesis 6 account is true, would blow the theory of evolution out of the water, and they would have to admit they are responsible to the God of the universe.

[DMD13]

For them to conceed that the narrative pertaining to Giants is real would destroy the Darwinian paradigm.