Excellent post, Explorer. Lots to chew on there..........
I think you hit it on the noggin with PTSD. That is a common psychological illness that follows most trauma in most people. I've suffered it so many times I have come to recognize it in my behaviors, but I can't seem to avoid it even though I know it's happening. Time seems to be the best medicine, along with awareness.
I think it's more about the surprise along with the realization that they are potentially dangerous. There's also the subconscious realization that what they've seen has been recognized by our ancestors as a "monster". Even most deer hunters know about dangerous animals in the wilds like bears, big cats, snakes, etc, so we know that guns don't preclude the potential of being harmed or killed by dangerous animals, but sasquatches are a species that they never realized actually existed.
I don't accept the "telepathic" relationships with sasquatches, but I concede that benign relationships based upon body language can exist with them. I think that both a fear of them and an inquisitive, benign, and even friendly relationship with them are good, healthy senses of reality........as long as one doesn't take it as far as Timothy Treadwell did with bears. That was a mentality of fantasy even beyond that exhibited by charlie Vandergaw, even though Vandergaw lived just as dangerously. At least he knew he was living on the edge.
Interesting ideology. I agree that living organisms want to stay alive, and there is a natural survival drive (I've experienced it intensely in the moments before sure death), and I agree that the true intentions of other life forms might be hidden or disguised, but one need not "eradicate" the other entire species to ensure safety. First of all, screw everybody else.......it's about me personally. There is no shortage of other people, and other people represent the most dangerous, deceptive, and undesirable hostile life forces out there to me. And AFAIC, almost all other species are a needed life form. Even mosquitoes are needed by birds as food. We've eradicated the smallpox virus, I certainly approve of that, and I'd love to see similar microscopic critters killed off, but not so much after we get up into the insect family and larger.