If anything, the Reptile side of the argument teaches us a very important fact.

If you do these things to human babies... you are not human.

I don't care what you were born as or want to be classified as or what you want to avoid. Humanity, as a collective, decides you aren't human anymore... so it's only natural actual humans start suspecting you might be a reptile, or a nephilim, or an alien, or a worm in a body suit, or whatever.

The human brain is naturally wired to recognize something that imitates a human... and we are naturally wired to hate it.

[link to www.livescience.com (secure)]

"The spooky region occupied by these characters, so close to us and yet so far, is known as "the uncanny valley." The term comes from a graph created by Japanese roboticist Masahiro Mori that plots human empathy against the anthropomorphism of robots. On the graph, as robots become more realistic and we feel more and more empathy for them, the line trends upward. But as the robots' humanism approaches that of actual humans, our empathy for them — and the line on the graph — suddenly plummets. The resemblance between human and robot goes from remarkable to repulsive, and this precipitous drop became known as the "uncanny valley."

Reptile, robot, AI, demon, alien, does it matter? We can tell when it's not in our species' best interests, is the gist of it. Almost like we've been hardwired, over the ages, to recognize and dislike imposters because of the things those imposters are doing to us.