David has been researching this aspect of reality for 3 decades.
He explains how the interbreeding aliens were those described in ancient religions and how through the centuries the interbreeding became the royalty and now in modern times the elite class of bankers and politicians etc as people rejected royalty.
Shapeshifting is perfectly possible once the nature of reality is understood and that nothing is solid.
Humans experience a tiny slice of the electro-magnetic spectrum and hybrids can switch to the alien reptilian frequency when they wish and humans would see the shapeshifting in front of their eyes as many witnesses have testified.
Highly relevant for understanding that the present agenda is anti-human and why.