It's pretty late here (ok, VERY late), so I'll be short for now.
My thinking is that the reptilians are, at least in part, those behind the Illuminati. Of course, like all races, they aren't necessarily inherently evil. There may be good guys. On the other hand, David Icke in the beginning of his conspiracy career, described them as "demons", and I believe demons, on the other hand, ARE inherently evil, though I doubt anyone has fully explored the phenomenon of such beings, so who can really say for sure?
Anyways, one thing is clear, the majority of contact with them HAVE been hostile. Make of this what y'all will. Me, I wouldn't trust them for a second. Then again I'm inherently racist and skeptic towards extraterrestrial beings until they've proven themselves to be dashing good guys. It's an undeniable flaw in my character.
"Better be dead and cool, than alive and uncool" Harley Davidson