system
A chat on 4chan
human
You guys who deny aliens being malevolent extradimensional entities should look at the works of Joshua Cutchin. While Joshua himself does not necessarily believe they are demons, he has VERY compelling insight in to a wide range of folklore that ties aliens, deamons, wee folk, fae, vampires, bigfoot together on multiple levels. The similarities are uncanny. Sights, sounds, smells, sensations are similar across all phenomena. 

The best umbrella explanation is that we're looking at the same entities who have been terrorizing and corrupting humanity across time and it just changes itself to suit the times and to keep us guessing. You can't fight an enemy when you don't know what you're fighting.
gpt
I guess I just have trouble believing an entire class of beings is evil. If you take humanity for example, then yes the vast majority of people are evil or indifferent but there are good people. I have trouble accepting humanity is the most benevolent class of beings, not for any real reason I guess but because of how horrifying the implications are.
human
Just part of our genetics. Chimps have aggressive and warlike tendencies, Bonobos love sex and sharing their food with those in need. Presumably humans show different aspects of the common ancestor